A highly safe pasta machine

Abstract

This invention discloses a main unit equipped with a motor, a safety ejection mechanism, a mixing chamber with a stirring rod, an extrusion cylinder communicating with the mixing chamber, and a die assembly connected to the extrusion cylinder. An extrusion screw is installed inside the extrusion cylinder. The die assembly includes an outer cylinder with a dough-dispensing area, an inner cylinder fitted inside the outer cylinder, and a die cap with a through hole. The inner cylinder has a dough-dispensing opening on its side wall communicating with the dough-dispensing area. The outer cylinder fitted with the inner cylinder is installed in the extrusion cylinder via the die cap. When the outer cylinder is not fully installed, the safety ejection mechanism, through the extrusion screw, acts on the inner cylinder to create an axial movement distance. This axial movement distance is not less than the engagement distance of the extrusion screw, allowing the extrusion screw to move to a disengaged state under the action of the safety ejection mechanism. This solution effectively solves the problem of fingers being pinched at the dough-dispensing opening of the inner cylinder when the pasta machine is accidentally started due to an incomplete outer cylinder installation, thus improving the safety of the pasta machine.

Description

Technical Field

[0001] This invention belongs to the field of food processing machine technology, and in particular relates to a high-safety pasta machine. Background Technology

[0002] The earliest noodle makers used a one-piece mold head, meaning there was only one noodle-extruding area on the side wall of the mold head. Noodle makers using this one-piece mold head required several mold heads, which took up a lot of space in the packaging. During use, different types of noodle-extruding mold heads needed to be constantly replaced, making operation inconvenient. To save space occupied by the die head, researchers later developed two types of die heads: one type involves opening an installation port on the side wall of the die head, on which a mold piece with an exit hole can be replaced, so that one die head can be equipped with multiple mold pieces, thus saving space occupied by the die head (hereinafter referred to as the first type of die head); the other type is a die head structure with inner and outer cylinders, as disclosed in patent application number 201720614070.5. The inner cylinder and the outer cylinder are installed on the front end of the extrusion cylinder through the die head cover. Specifically, the side wall of the outer cylinder is provided with at least two exit areas with forming holes along the circumference, and the forming hole shape of each exit area is different; the inner cylinder forms a receiving cavity, and the side wall of the inner cylinder is provided with an exit port that connects to the receiving cavity (hereinafter referred to as the second type of die head). When the second type of mold head is in operation, the outlet can only be aligned with and connected to one of the noodle-producing areas. This allows the noodle machine to extrude different shapes of noodles (such as noodles of different shapes) through the forming holes of different noodle-producing areas. Moreover, a single mold head structure integrates the functions of making multiple specific shapes of noodles into one, saving the cost of the noodle machine.

[0003] Our company has provided solutions to the safety issues of noodle machines using the first type of mold head. Specifically, patent application number 201720114142.X discloses a solution where the bottom wall of the mold head support has a through hole allowing the screw tip to extend into the machine when the mold piece is not properly installed. The front end of the mold piece has a cover to conceal this through hole. This ensures that if the user forgets to install the mold piece and accidentally starts the noodle machine, the screw tip can pass through the through hole, while the rear end of the screw is not connected to the motor, preventing rotation and thus improving the safety of the noodle machine. Based on the above patent solution, our company has further improved the mold head structure. For example, patent 202121889947.4 discloses a solution where the mold piece and the end cover are fixedly connected via a bending portion, enhancing the strength and safety of the detachable mold head.

[0004] However, for noodle machines using the second type of die head, there is still no good solution to address the safety risks. For example, patent 201720614070.5 discloses a second type of die head, and its instruction manual and accompanying drawings... Figure 2 , Figure 3 and Figure 7As shown, when the user omits the extrusion die head and directly uses the locking nut to limit the inner cylinder of the die head onto the extrusion cylinder, specifically, the locking nut limits the inner cylinder of the die head onto the extrusion cylinder through the stop ring of the inner cylinder. The positioning protrusion of the inner cylinder of the die head positions the screw to ensure the engagement of the screw with the power component. At this time, the extrusion screw is exposed through the dough outlet on the lower side of the inner cylinder. If the user starts the noodle machine at this time, the extrusion screw is still rotating, and the rotating and exposed screw can easily pose a risk to the user. If the user touches the dough outlet, there is a safety risk of the hand being pinched in the gap between the dough outlet and the extrusion screw, making it difficult to guarantee the user's safety. Summary of the Invention

[0005] The purpose of this invention is to provide a pasta machine that, when the outer cylinder is missing, prevents the inner cylinder from being fixedly installed on the extrusion cylinder to axially press against the extrusion screw, causing the extrusion screw to be in a disengaged state and unable to rotate, thereby effectively solving the problem of hand pinching at the noodle outlet of the inner cylinder and improving the safety of the pasta machine.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A highly safe pasta machine includes a main unit equipped with a motor, a safety ejection mechanism, a mixing chamber with a stirring rod, an extrusion cylinder communicating with the mixing chamber, and a die assembly connected to the extrusion cylinder. An extrusion screw is installed inside the extrusion cylinder. The die assembly includes an outer cylinder with a dough output area, an inner cylinder fitted inside the outer cylinder, and a die cover with a through hole. The side wall of the inner cylinder has an output port communicating with the dough output area. The outer cylinder fitted with the inner cylinder is installed to the extrusion cylinder via the die cover. When the outer cylinder is not fully installed, the safety ejection mechanism, through the extrusion screw, acts on the inner cylinder to cause an axial movement distance in the inner cylinder. This axial movement distance is not less than the engagement distance of the extrusion screw, allowing the extrusion screw to move to a disengaged state under the action of the safety ejection mechanism.

[0008] The die cap acts as a connecting bridge between the outer cylinder and the extrusion cylinder, reliably fixing them together to reduce the possibility of collisions and movement between the outer and extrusion cylinders during operation, which could cause abnormal noise. Based on the stable installation of the outer and extrusion cylinders, a safety ejection mechanism is designed to act on the inner cylinder via the extrusion screw when the outer cylinder is not fully installed. The axial movement distance of the inner cylinder is not less than the engagement distance of the extrusion screw, allowing the extrusion screw to move to a disengaged state under the action of the safety ejection mechanism. It can be understood that the engagement distance can be the engagement distance between the extrusion screw and the motor, or the engagement distance of the extrusion screw or the stirring rod, etc. At this time, even if the user accidentally starts the pasta machine, the extrusion screw cannot rotate, effectively solving the problem of fingers being pinched at the noodle outlet of the inner cylinder and improving the safety of the pasta machine. Specifically, because the axial movement distance of the inner cylinder is not less than the engagement distance between the extrusion screw and the motor or stirring rod, when the outer cylinder is not fully installed, the inner cylinder becomes loose and cannot axially press against the extrusion screw. In this way, under the action of the safety ejection mechanism, the extrusion screw has a sufficient ejection distance, thereby ensuring that the extrusion screw can move smoothly axially outward to the disengaged state, further ensuring that the extrusion screw of the noodle machine can only achieve transmission when the outer cylinder is installed in place.

[0009] Understandably, the axial movement distance of the inner cylinder should not be less than the engagement distance between the extrusion screw and the motor or stirring rod, including at least two scenarios: the inner cylinder cannot detach from the die head cover, and the inner cylinder passes through the die head cover. It is also understandable that the safety ejection mechanism can act directly or indirectly on the extrusion screw.

[0010] Preferably, the safety ejection mechanism, the extrusion screw, and the inner cylinder are coaxially arranged. When the outer cylinder is missing and the inner cylinder can pass through the through hole, the radial dimension of the inner cylinder is not greater than the minimum radial dimension of the through hole, so that the inner cylinder can be released from the limit of the die head cover. Alternatively, when the outer cylinder is missing and the inner cylinder cannot pass through the through hole, the inner cylinder can only move axially within the gap between the extrusion cylinder and the die head cover. The ratio of the engagement distance between the extrusion screw and the motor or stirring rod to the axial movement distance of the inner cylinder is between 0.5 and 1.0.

[0011] By coaxially arranging the safety ejection mechanism, the extrusion screw, and the inner cylinder, the ejection direction of the safety ejection mechanism is consistent with the push-out direction of the extrusion screw when the outer cylinder is missing. This ensures that the extrusion screw pushes the inner cylinder with minimal force, preventing any component from getting stuck in the ejection channel during tilting and pressing.

[0012] Based on this, the solution to ensure that the extrusion screw disengages from the engagement state when the outer cylinder is missing includes: (1) When the outer cylinder is missing and the inner cylinder can pass through the through hole, the radial dimension of the inner cylinder is not greater than the minimum radial dimension of the through hole, so as to ensure that the inner cylinder can pass through the through hole and disengage from the limit of the die cap. That is to say, the inner cylinder and the die cap have no assembly relationship and must be assembled through the outer cylinder. In this way, when the outer cylinder is missing, the inner cylinder has no pushing force on the extrusion screw, and the safety ejection mechanism only needs to meet the requirement of being able to push the extrusion screw out of engagement. The requirements for the safety ejection mechanism are low and it is easier to achieve safety. It is understandable that the inner cylinder disengaging from the limit of the die cap includes the inner cylinder coming out of the die cap but still hanging on the front end of the extrusion screw, or the inner cylinder falling off the extrusion screw.

[0013] (2) When the axial clearance between the extrusion cylinder and the die cap is not less than the engagement distance of the extrusion screw, the inner cylinder can be designed so that it cannot pass through the die cap, meaning the inner cylinder only moves axially within the gap between the extrusion cylinder and the die cap. In this way, when the outer cylinder is missing, the extrusion screw moves loosely only between the extrusion cylinder and the die cap under the action of the safety ejection mechanism. This allows the extrusion screw to disengage smoothly from the engagement state while preventing the inner cylinder from being ejected and injuring the user if the elastic force of the safety ejection mechanism is too large. Furthermore, the ratio of the engagement distance between the extrusion screw and the motor or stirring rod to the axial movement distance of the inner cylinder is set between 0.5 and 1.0. This ensures that the extrusion screw can disengage smoothly when the outer cylinder is missing, while also preventing the axial movement distance of the inner cylinder from being too large, which would result in an excessively long contact portion between the outer cylinder and the die cap, increasing costs and making cleaning the outer cylinder more difficult.

[0014] Preferably, the inner cylinder includes a first cylinder body disposed inside the outer cylinder and a second cylinder body exposed outside the outer cylinder. The radial dimension of the first cylinder body is not greater than the radial dimension of the second cylinder body, and the radial dimension of the second cylinder body is not greater than the radial dimension of the through hole, so that the second cylinder body is positioned between the extrusion cylinder and the die head cover when the die head cover is installed to limit the outer cylinder.

[0015] The inner cylinder includes a first cylinder housed within the outer cylinder and a second cylinder exposed outside the outer cylinder. The first cylinder housed within the outer cylinder is used to connect with the inner and outer cylinders, enabling communication between the outlet and the outlet area, thus ensuring smooth outlet flow. The second cylinder exposed outside the outer cylinder serves as a grip during the installation of the inner and outer cylinders, facilitating lifting and installation. When the first and second cylinders form a stepped cylinder structure, the radial dimension of the first cylinder is not greater than the radial dimension of the second cylinder. It is understood that the first and second cylinders can also form a straight cylinder structure with the same radial dimension.

[0016] Furthermore, the radial dimension of the second cylinder is set to be no larger than the through hole, so that when the outer cylinder is not installed, the second cylinder can smoothly pass through the through hole of the die head cover, that is, the inner cylinder can disengage from the die head cover, thereby disengaging the extrusion screw and effectively avoiding the installation risk of pinching hands at the noodle outlet. It can also be used to position the second cylinder between the extrusion cylinder and the die head cover when the die head cover is installed and limiting the outer cylinder during noodle machine operation. That is, the die head cover can only fix the inner cylinder between the extrusion cylinder and the die head cover by limiting the outer cylinder when the outer cylinder is installed in place.

[0017] Preferably, the inner cylinder includes a second cylinder body exposed outside the outer cylinder, wherein the ratio of the radial dimension of the second cylinder body to the radial dimension of the through hole on the side near the outer cylinder is between 0.85 and 1.3.

[0018] Normally, in operation, the second cylinder, exposed outside the outer cylinder, is positioned within the through hole of the die head cover, while the first cylinder, located inside the outer cylinder, protrudes from the front end of the die head cover. Therefore, based on the condition that the axial movement distance of the inner cylinder is not less than the engagement distance between the extrusion screw and the motor or stirring rod, the ratio of the radial dimension of the second cylinder to the radial dimension of the through hole near the outer cylinder is set between 0.85 and 1.3. This ensures that if the outer cylinder is not fully installed, the extrusion screw moves to a disengaged state under the action of the safety ejection mechanism. Specifically, when this ratio is between 0.85 and 1.0, the radial dimension of the second cylinder is not greater than the radial dimension of the through hole near the outer cylinder. That is, if the outer cylinder is not fully installed, the safety ejection mechanism acts on the inner cylinder through the extrusion screw, and when the extrusion screw disengages, the inner cylinder also disengages from the die head cover's limit, ensuring the safety of the noodle machine. When this ratio is between 0.85 and 1.0, the radial dimension of the second cylinder is greater than the radial dimension of the through hole near the outer cylinder. This means that the die cap axially limits the inner cylinder, preventing it from passing through the through hole of the die cap. The advantage of this solution is that, in addition to ensuring safety, it also prevents the inner cylinder from being ejected from the through hole of the die cap and accidentally injuring the user due to excessive elasticity of the safety ejection mechanism.

[0019] Preferably, the diameter of the through hole near the outer cylinder is D1, and the maximum radial dimension of the inner cylinder is D2, where 0mm≤D1-D2≤5mm.

[0020] Regardless of whether the front end of the inner cylinder blocks the end face of the extrusion screw, it is essential to ensure that the inner cylinder cannot be installed on the extrusion cylinder when the outer cylinder is not installed. This means the inner cylinder must pass through the through hole and disengage from the die cap, thus ensuring the extrusion screw is in a disengaged state. To this end, this design sets the diameter of the through hole near the outer cylinder to D1, and the maximum radial dimension of the inner cylinder to D2, where 0mm ≤ D1 - D2 ≤ 5mm, ensuring the radial dimension of the inner cylinder is smaller than the through hole. Thus, when the outer cylinder is not installed, since the inner cylinder and die cap are not engaged, the extrusion screw, under the force of the safety ejection mechanism, pushes the inner cylinder outward until it disengages, ensuring the safety of the noodle machine. This design only requires increasing the size of the through hole in the existing die cap or reducing the thickness of the inner cylinder in the existing die cap, resulting in minimal structural changes and low manufacturing costs.

[0021] Preferably, the inner cylinder has a first front end face on the side facing the outer cylinder, and the first front end face is sealed to the side wall of the inner cylinder. The front end of the outer cylinder has a second front end face that is sealed to the side wall of the outer cylinder, or the front end of the outer cylinder has a second front outlet that is blocked by the first front end face.

[0022] With no installation connection between the inner cylinder and the die cap (meaning the inner cylinder can protrude through the through hole of the die cap even when the outer cylinder is not installed), a first front end face is provided on the side of the inner cylinder facing the outer cylinder to enhance the innermost layer of pressure exerted by the inner cylinder on the extrusion screw during operation and ensure that the extrusion screw is in a meshing transmission state. The first front end face is sealed to the side wall of the inner cylinder, preventing materials such as flour lint from overflowing from the gap between the first front end face and the inner cylinder. To further ensure the reliability of the axial pressure on the extrusion screw, a second front end face is provided at the front end of the outer cylinder, which is sealed to the side wall of the outer cylinder. Through the double-layer axial pressure of the first and second front end faces on the extrusion screw, the stability of the extrusion screw operation is ensured.

[0023] Understandably, when the first front end face is sufficient to axially press against the extrusion screw, a second front outlet, blocked by the first front end face, can be provided at the front end of the outer cylinder. In this way, the outer cylinder becomes an axially through annular wall structure, which not only allows users to easily insert cleaning tools into the outer cylinder to clean the outlet of the surface area, but also saves on the cost of manufacturing the outer cylinder.

[0024] Preferably, the first front end face is provided with a positioning shaft protruding towards the inside of the inner cylinder, and the front end face of the extrusion screw is provided with a positioning groove that cooperates with the positioning shaft. The extrusion screw, the inner cylinder, the positioning shaft, and the positioning groove are coaxially arranged.

[0025] To achieve radial positioning of the inner cylinder relative to the front end of the extrusion screw, a positioning shaft protruding towards the interior of the inner cylinder is provided on the first front end face, and a positioning groove cooperating with the positioning shaft is provided on the front end face of the extrusion screw. Based on this, by coaxially arranging the extrusion screw, inner cylinder, positioning shaft, and positioning groove, it is easier to install the inner cylinder and extrusion screw together. Furthermore, it ensures a balanced distance between the extrusion screw and the side wall of the inner cylinder, resulting in balanced force on the inner cylinder during the surface forming process and reducing radial offset and wobbling between the inner cylinder and the extrusion screw. Simultaneously, the coaxial arrangement of the extrusion screw and inner cylinder allows for easier linear movement of the inner cylinder when the outer cylinder is not installed, ensuring that the inner cylinder does not jam on the die cap and hinder the ejection of the extrusion screw.

[0026] Preferably, the inlet end of the outer cylinder is provided with a stop ring extending radially outward along the side wall of the outer cylinder, and the inner cylinder includes a second cylinder body exposed outside the outer cylinder. The end face of the second cylinder body forms an axial fit with the stop ring. The stop ring and the second cylinder body are sandwiched between the extrusion cylinder and the die head cover. When the outer cylinder is not filled, the axial movement distance of the inner cylinder is equal to the axial thickness of the stop ring.

[0027] One end face of the stop ring and the end face of the second cylinder form an axial fit. This ensures that when the inner cylinder is fitted inside the outer cylinder, it informs the user that the inner and outer cylinders are properly installed when the end face of the second cylinder makes axial contact with the stop ring. The other end face of the stop ring forms an axial fit with the die cap, and the stop ring and the second cylinder are sandwiched between the extrusion cylinder and the die cap. The advantage of this installation method is that if either the outer or inner cylinder is missing, the remaining one is loosely installed on the extrusion cylinder, thus providing space for the extrusion screw to eject. Specifically, by setting the axial movement distance of the inner cylinder to be equal to the axial thickness of the stop ring when the outer cylinder is missing (i.e., the axial thickness of the stop ring is not less than the engagement distance of the extrusion screw), the extrusion screw can be smoothly ejected by the safety ejection mechanism and placed in a stopped state, thereby ensuring the safety of the noodle machine. At the same time, because the second cylinder of the inner cylinder has an axial limit with the die cap, even if the elastic force of the safety ejection mechanism is too large, the extrusion screw cannot eject the inner cylinder from the die cap and accidentally injure the user.

[0028] Preferably, the locking distance of the die head cover is L1, the axial locking distance between the die head cover and the extrusion cylinder is L2, and the axial thickness of the stop ring is L3, wherein 0mm≤(L2+L3)-L1≤20mm.

[0029] When only a stop ring is clamped between the die cap and the extrusion cylinder, to ensure the outer cylinder is reliably fixed to the extrusion cylinder, the locking distance L1 of the die cap must not exceed the sum of the axial locking distance L2 between the die cap and the extrusion cylinder and the axial thickness L3 of the stop ring. Preferably, 0mm ≤ (L2 + L3) - L1 ≤ 2mm. If (L2 + L3) - L1 > 2mm, the die cap needs to have greater strength to install the extrusion cylinder and the outer cylinder together, making installation more difficult for the user. If (L2 + L3) - L1 < 0mm, after the die cap installs the extrusion cylinder and the outer cylinder together, the large value of L1 results in a loose gap in the stop ring.

[0030] Understandably, when the second cylinder, which holds the stop ring and inner cylinder between the die cap and the extrusion cylinder, is held, the value of ((L2+L3)-L1) should not exceed the axial length of the second cylinder, preferably 2mm≤(L2+L3)-L1≤20mm. If (L2+L3)-L1>20mm, the axial length of the second cylinder is too long, requiring an increase in the axial length of the extrusion cylinder, extrusion screw, and die cap, thus increasing costs. Since the second cylinder can be used as a grip to facilitate the user's disassembly and assembly of the inner and outer cylinders, and it is nested with the extrusion cylinder to radially position the inner cylinder, if (L2+L3)-L1<2mm, the axial length of the second cylinder is too short, making it difficult for the user to hold the second cylinder and disassemble the inner and outer cylinders. Furthermore, the shorter overlap length between the second cylinder and the extrusion cylinder results in weaker radial restraint force of the extrusion cylinder on the inner cylinder, making it easier for the inner cylinder to slip out of the extrusion cylinder.

[0031] Preferably, the diameter of the through hole near the outer cylinder is D1, and the maximum radial dimension of the part of the outer cylinder that abuts against the mold head cover is D3, wherein 1mm≤D3-D1≤8mm.

[0032] To prevent the outer cylinder from passing through the through hole in the die cap, the outer cylinder is designed to axially abut against the die cap after passing through the through hole. Specifically, when 1mm ≤ D3-D1 ≤ 8mm, the axial contact area between the end of the die cap near the outer cylinder and the outer cylinder is sufficient to secure the outer cylinder to the extrusion cylinder, preventing it from slipping out. When D3-D1 < 1mm, the axial contact area between the die cap and the outer cylinder is too small, and the strong torque of the extrusion screw during the surface forming process can easily push the outer cylinder out of the die cap, leading to surface forming failure. When D3-D1 > 8mm, the axial contact area between the die cap and the outer cylinder is too large, requiring an increase in the size of the die cap and outer cylinder, increasing costs, and also hindering the installation of the outer cylinder and the die cap. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure of the pasta machine described in this invention.

[0034] Figure 2 This is a cross-sectional view of the overall structure of the pasta machine described in this invention.

[0035] Figure 3 yes Figure 2 A magnified view of a portion of region A shown.

[0036] Figure 4 This is a cross-sectional view of the overall structure of the machine when the outer cylinder is missing, as described in this invention.

[0037] Figure 5 yes Figure 4 A magnified view of a portion of region B shown.

[0038] Figure 6 This is a schematic diagram of the structure of the inner cylinder of the present invention when it is pushed out by the extrusion screw.

[0039] Figure 7 This is a schematic diagram of the structure of the mold head assembly as described in this invention when it is installed in place.

[0040] Figure 8 This is an exploded view of the structure of the extrusion cylinder, extrusion screw, and die assembly described in this invention.

[0041] Figure 9 This is an exploded view of another extrusion cylinder, extrusion screw, and die assembly described in this invention.

[0042] Figure 10 This is an exploded view of the structure of another extrusion cylinder, extrusion screw, and die head assembly described in this invention.

[0043] In the diagram: 1. Main unit; 11. Motor; 2. Mixing chamber; 21. Mixing rod; 3. Extrusion cylinder; 31. Extrusion screw; 311. Pushing section; 312. Spiral section; 313. Positioning groove; 4. Die head assembly; 41. Outer cylinder; 411. Outlet area; 412. Positioning shaft; 413. Second front outlet; 414. Second front end face; 415. Stop ring; 42. Die head cover; 421. Through hole; 43. Inner cylinder; 431. Outlet; 432. First front outlet; 433. First cylinder; 434. Second cylinder; 435. First front end face; 436. Limiting ring; 5. Safety ejection mechanism; 51. Spring; 52. Push rod; 53. Mounting groove. Detailed Implementation

[0044] The present invention will now be further described with reference to the accompanying drawings and specific embodiments.

[0045] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be arbitrarily combined with each other.

[0046] Unless otherwise defined, the technical or scientific terms used in this invention shall have the ordinary meaning understood by one of ordinary skill in the art to which this invention pertains. The terms "first," "second," and similar terms used in this invention do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Terms such as "comprising" or "including" mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. Terms such as "connected" or "linked" are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect.

[0047] This invention provides a highly safe pasta machine, such as... Figure 1-10 As shown, the assembly includes a main unit 1 equipped with a motor 11, a safety ejection mechanism 5, a mixing chamber 2, an extrusion cylinder 3 communicating with the mixing chamber 2, and a die head assembly 4 connected to the extrusion cylinder 3. A mixing rod 21 is installed inside the mixing chamber 2, and an extrusion screw 31 is installed inside the extrusion cylinder 3. Specifically, the die head assembly 4 includes an outer cylinder 41 with at least one dough-producing area 411, an inner cylinder 43 fitted inside the outer cylinder 41, and a die head cover 42 that mounts the outer cylinder 41 onto the extrusion cylinder 3. The die head cover 42 has a through hole 421 extending from front to back. The outer cylinder 41 and the inner cylinder 43 can be collectively referred to as the die head. The motor 11 drives the mixing rod 21 and the extrusion screw 31 to rotate, achieving the functions of dough mixing and dough production.

[0048] In this embodiment, reference Figure 1 , 2 7. The inner cylinder 43 has an outlet 431 on its side wall that communicates with the dough outlet area 411. The outer cylinder is installed on the extrusion cylinder via a die cap. Specifically, after the inner cylinder 43 is installed on the outer cylinder 41, the inner cylinder 43 and outer cylinder 41 are aligned with the extrusion cylinder 3, and the die cap 42 is fitted onto the connection between the outer cylinder 41 and the extrusion cylinder 3, thus fixing the inner cylinder 43 and outer cylinder 41 onto the extrusion cylinder 3. Preferably, the die cap 42 is connected by screwing onto the outer side wall of the extrusion cylinder 3. At this time, the dough outlet 431 of the inner cylinder 43 is connected to a corresponding dough outlet area 411. That is, when the dough enters the inner cylinder 43 through the extrusion cylinder 3 and reaches the dough outlet 431, it will pass through the dough outlet area 411 to be extruded.

[0049] For details, please refer to Figure 2The safety ejection mechanism 5 is directly connected to the drive shaft of the extrusion screw 31 and inserted into the output shaft hole of the motor 11. The safety ejection mechanism 5 is installed inside the motor to directly act on the extrusion screw 31. Alternatively, when the extrusion screw 31 and the stirring rod 21 are coaxially and horizontally positioned, the safety ejection mechanism 5 can be located between the motor and the stirring rod 21 to indirectly act on the extrusion screw 31 through the stirring rod 21; or, the safety ejection mechanism 5 can be located between the extrusion screw 31 and the stirring rod 21 to directly act on the extrusion screw 31. It can also be understood that when the extrusion screw 31 and the stirring rod 21 are arranged vertically parallel, the safety ejection mechanism 5 can be located between the motor 11 and the extrusion screw 31, or the safety ejection mechanism 5 can be located inside the motor shaft hole to directly act on the extrusion screw 31. In other words, in this solution, by setting the safety ejection mechanism 5, it can directly or indirectly act on the extrusion screw 31, so that when the outer cylinder 41 is missing, the safety ejection mechanism 5 can directly or indirectly provide an outward ejection force to the extrusion screw 31.

[0050] In this application, to more clearly illustrate the solution, the vertical pasta machine shown in the attached diagram is used as an example. (Reference) Figures 4 to 7 The die cap 42 acts as a connecting bridge between the outer cylinder 41 and the extrusion cylinder 3, reliably fixing them together to reduce the possibility of collisions or movement between the outer cylinder 41 and the extrusion cylinder 3 during operation, causing abnormal noises. With the outer cylinder 41 and extrusion cylinder 3 stably installed, a safety ejection mechanism 5 is designed to act on the inner cylinder 43 via the extrusion screw 31 when the outer cylinder 41 is not fully installed. This causes the inner cylinder 43 to move axially, with the axial movement distance not less than the engagement distance of the extrusion screw. This allows the extrusion screw 31 to move to a disengaged state under the action of the safety ejection mechanism 5. At this point, even if the user accidentally starts the pasta machine, the extrusion screw 31 cannot rotate, effectively solving the problem of fingers being pinched at the inner cylinder outlet and improving the safety of the pasta machine.

[0051] It should be noted that the engagement distance of the extrusion screw 31 mentioned in this article can be the engagement distance between the extrusion screw 31 and the motor 11 when they are in operation (reference). Figure 2 The engagement distance L' indicated in the figure, or the engagement distance between the extrusion screw 31 and the stirring rod 21 in the working state (i.e., when the extrusion screw and the stirring rod are set coaxially), etc.

[0052] Specifically, since the axial movement distance of the inner cylinder 43 is not less than the engagement distance between the extrusion screw 31 and the motor 11 or the stirring rod 21, when the outer cylinder 41 is not installed, the inner cylinder 43 is loose and cannot axially press against the extrusion screw 31. Thus, under the action of the safety ejection mechanism 5, the extrusion screw has sufficient ejection distance, ensuring that the extrusion screw 31 can smoothly move axially outward to disengage from the engagement state. This further ensures that the extrusion screw of the noodle machine can only achieve transmission when the outer cylinder is installed in place.

[0053] Understandably, the axial movement distance of the inner cylinder 43 is not less than the engagement distance between the extrusion screw 31 and the motor 11 or the stirring rod 21, including at least the two situations where the inner cylinder cannot detach from the die cover 42 and the inner cylinder 41 passes through the die cover 42.

[0054] It should be noted that the engagement distance of the extrusion screw 31 can be understood as the engagement distance between the extrusion screw and the output shaft of the motor, or the engagement distance between the extrusion screw and the stirring rod. Typically, this engagement distance is between 10mm and 25mm, preferably 15mm, 18mm, or 20mm. This invention does not specifically limit the actual engagement distance. When the engagement distance is preferably 18mm, the ejection force of the safety ejection mechanism must ensure that the extrusion screw moves at least 18mm, thereby causing the inner cylinder to move at least 18mm as well, to improve the safety of the pasta machine.

[0055] In some preferred embodiments of the present invention, by coaxially arranging the safety ejection mechanism 5, the extrusion screw 31, and the inner cylinder 43, when the outer cylinder 41 is not installed, the ejection direction of the safety ejection mechanism 5 is consistent with the pushing direction of the extrusion screw 31. This ensures that the extrusion screw 31 pushes the inner cylinder 43 with minimal ejection force, preventing any component from getting stuck in the ejection channel during tilted pushing. For example, when the extrusion screw tilts to push the inner cylinder, the inner cylinder is prone to getting stuck in the through hole of the die head cover; when the safety ejection mechanism tilts to push the extrusion screw 31, the extrusion screw 31 is prone to getting stuck in the extrusion cylinder 3.

[0056] Based on this, solutions to ensure the extrusion screw disengages from the engagement state when the outer cylinder is underfilled include:

[0057] (1)Reference Figure 6 When the outer cylinder 41 is not installed and the inner cylinder 43 can pass through the through hole 421, the radial dimension of the inner cylinder 43 is not greater than the minimum radial dimension of the through hole 421, to ensure that the inner cylinder 43 can pass through the through hole 421 and disengage from the limiting position of the die head cover 42. In other words, the inner cylinder and the die head cover are not assembled together and must be assembled through the outer cylinder. Thus, when the outer cylinder 41 is not installed, the inner cylinder 43 has no pushing force on the extrusion screw 31, and the safety ejection mechanism 5 only needs to be able to push the extrusion screw 31 out of engagement. The requirements for the safety ejection mechanism 5 are low, and it is easier to achieve safety.

[0058] Understandably, the limitation of the inner cylinder 43 detaching from the die head cover 42 includes the case where the inner cylinder 43 detaches from the die head cover 42 but is still hanging on the front end of the extrusion screw 31, or the case where the inner cylinder 42 falls off the extrusion screw 31.

[0059] (2) Provided that the axial gap between the extrusion cylinder 3 and the die cap 42 is not less than the engagement distance of the extrusion screw 31, the inner cylinder 43 can be set so that it cannot pass through the die cap 42, that is, the inner cylinder 43 can only move axially within the gap between the extrusion cylinder 3 and the die cap 42. In this way, when the outer cylinder 41 is missing, under the action of the safety ejection mechanism 5, the extrusion screw 31 can only move loosely between the extrusion cylinder 3 and the die cap 42, which can not only allow the extrusion screw 31 to smoothly disengage from the engagement state, but also prevent the inner cylinder 43 from being ejected and accidentally injuring the user when the elastic force of the safety ejection mechanism 5 is too large.

[0060] Furthermore, the ratio of the engagement distance between the extrusion screw 31 and the motor 11 or the stirring rod 21 to the axial movement distance of the inner cylinder 43 is set between 0.5 and 1. This ensures that the extrusion screw 31 can smoothly disengage when the outer cylinder 41 is not installed, while also preventing excessive axial movement distance of the inner cylinder 43 from causing an excessively long contact portion between the outer cylinder 41 and the die cap 42, which would increase costs and make cleaning the outer cylinder more difficult. (Reference) Figure 7 When this ratio is less than 0.5, the thickness of the limiting ring 415 of the outer cylinder 41 needs to be very long, thus increasing the cavity depth of the outer cylinder 41 and greatly increasing the difficulty for users to clean the inside of the outer cylinder. When this ratio is greater than 1, the engagement distance between the extrusion screw 31 and the motor 11 is greater than the axial movement distance of the inner cylinder 43. That is, when the outer cylinder is missing, when the inner cylinder moves to the limiting ring of the die head cover, the inner cylinder cannot move axially at this time, and the extrusion screw has not completely disengaged. At this time, if the pasta machine is accidentally started, the extrusion screw 31 can rotate, and the rotating and exposed extrusion screw 31 can easily pose a risk to the user. If the user touches the noodle outlet 431, there may be a safety risk of the hand being pinched in the gap between the noodle outlet 431 and the extrusion screw 31, making it difficult to guarantee the user's safety.

[0061] In some preferred embodiments of the present invention, reference is made to Figure 7 and Figure 8 Regardless of whether the inner cylinder 43 can pass through the through hole 421 of the die cap 42, in this design, only the end of the inner cylinder 43 facing the outer cylinder 41 is provided with a first front outlet 432. The end face of the outer cylinder 41 laterally blocks the first front outlet 432, so that the first front outlet 432 is blocked by the end face of the outer cylinder 41 when the inner and outer cylinders are installed in place, forming a transport channel with only an inlet end communicating with the extrusion cylinder 3. At the same time, the end face of the outer cylinder 41 is used to laterally block the first front outlet 432 to prevent materials such as dough from overflowing from the first front outlet 432.

[0062] Furthermore, the cross-sectional area of ​​the first front outlet 432 is not less than the cross-sectional area of ​​the extrusion screw 31. This ensures that when the outer cylinder 41 is not fully loaded, the first front outlet 432 is exposed to the outside. Driven by the safety ejection mechanism 5, the extrusion screw 31 moves towards the front end of the extrusion cylinder 3 and can partially pass through the first front outlet 432 until it disengages. At this point, even if the user accidentally starts the pasta machine, the extrusion screw 31 remains stopped, preventing any pinching between the stopped extrusion screw 31 and the dough outlet 431 of the inner cylinder 43. In other words, this solution effectively solves the safety risk problem of existing pasta machines when the outer cylinder is not fully loaded.

[0063] It should be noted that the end face shape of the first front outlet 432 and the extrusion screw 31 is not specifically limited in this invention, as long as the extrusion screw 31 can pass through the first front outlet 432 when the outer cylinder 41 is not installed.

[0064] We know that a typical extrusion screw 31 includes a helical section 312 with a spiral and a pushing section 311 with ribs. After the extrusion screw 31 is installed, the pushing section 311 is exposed outside the extrusion chamber 3, while the helical section 312 is basically located inside the extrusion chamber 3. The cross-sectional area of ​​the helical section 312 is larger than that of the pushing section 311. Furthermore, the engagement distance of the extrusion screw 31 is often much shorter than that of the pushing section 311. Therefore, preferably, referring to... Figure 5 By setting the cross-sectional diameter of the push section 311 of the extrusion screw 31 to D5 and the cross-sectional diameter of the first front outlet 432 to D4, where D4 ≥ D5 (i.e., the cross-sectional area of ​​the first front outlet 432 is not less than the cross-sectional area of ​​the push section 311), it is ensured that the extrusion screw 31 can smoothly disengage from the output shaft hole of the motor. Simultaneously, this also prevents the entire extrusion screw 31 from slipping off the extrusion chamber 3 and falling and potentially injuring the user under the force of the safety ejection mechanism 5 if the first front outlet 432 is too large. Preferably, D5 is between 20mm and 40mm; more preferably, D5 is 30mm, 31mm, 32mm, 33mm, 34mm, or 35mm.

[0065] In some preferred embodiments of the present invention, the inner cylinder 43 is designed to protrude through the through hole 421 of the die cap 42 to ensure that the extrusion screw cannot rotate when the outer cylinder is not installed, and that there will be no pinching at the outlet 431. That is to say, regardless of whether the front end of the inner cylinder 43 blocks the end face of the extrusion screw 31, it must be ensured that when the outer cylinder 41 is not installed, the inner cylinder 43 cannot be installed on the extrusion cylinder 3, that is, it protrudes through the through hole and disengages from the die cap, so as to ensure that the extrusion screw is in a disengaged state.

[0066] refer to Figure 5In this design, the diameter of the through hole 421 near the outer cylinder 41 is set to D1, and the maximum radial dimension of the inner cylinder 43 is set to D2, where 0mm ≤ D1 - D2 ≤ 5mm, ensuring that the radial dimension of the inner cylinder 43 is smaller than that of the through hole 421. Thus, when the outer cylinder 41 is not properly installed, since the inner cylinder 43 and the die cap 42 have no mating relationship, the extrusion screw 31 pushes the inner cylinder 43 outward under the force of the safety ejection mechanism 5 until the extrusion screw 31 disengages, ensuring the safety of the noodle machine. This design only requires increasing the size of the through hole 421 on the existing die cap 42, or reducing the thickness of the inner cylinder 43 on the existing die cap, resulting in minimal structural changes and low manufacturing costs.

[0067] Understandably, when D1-D2 < 0 mm, the inner cylinder 43 has an axial contact with the front end of the die cap 42, making it difficult for the inner cylinder 43 to pass smoothly through the through hole 421. When D1-D2 > 5 mm, the radial clearance between the inner cylinder and the through hole is too large, and the inner cylinder is prone to tilting laterally under the pushing force of the extrusion screw 31, causing it to get stuck in the through hole 421 of the die cap 42.

[0068] Further reference Figures 7 to 10 Based on the premise that the inner cylinder 43 can pass through the through hole 421 of the die head cover 42, this design sets the inner cylinder 43 to include a first cylinder body 433 disposed inside the outer cylinder 41 and a second cylinder body 434 exposed outside the outer cylinder 41. The first cylinder body 433 disposed inside the outer cylinder 41 is used to fit inside and outside the outer cylinder 41, realizing the communication between the outlet 431 and the outlet area 411, thereby ensuring smooth outlet. The second cylinder body 434 exposed outside the outer cylinder 41 serves as a gripping part during the installation of the inner and outer cylinders, improving the ease of installation.

[0069] When the first cylinder 433 and the second cylinder 434 form a stepped cylinder structure, the radial dimension of the first cylinder 433 is not greater than the radial dimension of the second cylinder 434, and a stepped limiting ring 436 is formed at the connection between the first cylinder 433 and the second cylinder 434. The limiting ring 436 can be used to form an axial abutment with the inlet end of the outer cylinder 41 to provide installation guidance to the user, informing the user that the inner and outer cylinders are installed in place when the limiting ring and the inlet end of the outer cylinder 41 are in axial contact. Preferably, the limiting ring 436 can be used to form an axial abutment with the stop ring 415 at the inlet end of the outer cylinder 41.

[0070] Furthermore, the radial dimension of the second cylinder 434 is set to be no greater than that of the through hole 421, so that when the outer cylinder 41 is not installed, the second cylinder 434 can smoothly pass through the through hole 421 of the die head cover 42, that is, the inner cylinder 43 can disengage from the die head cover 42, thereby disengaging the extrusion screw 31 from the engagement state and effectively avoiding the installation risk of pinching hands at the noodle outlet 431. It can also be achieved that when the noodle machine is in operation, the second cylinder 434 is positioned between the extrusion cylinder 3 and the die head cover 42 when the die head cover 42 is installed to limit the outer cylinder 41. That is, the die head cover 42 can fix the inner cylinder between the extrusion cylinder 3 and the die head cover 42 only when the outer cylinder 41 is installed in place.

[0071] Understandably, in another embodiment, based on the fact that the inner cylinder 43 can pass through the through hole 421 of the mold head cover 42, the first cylinder 433 and the second cylinder 434 can be set to form a straight cylinder structure with the same radial dimension, that is, the radial dimension of the first cylinder 433 is equal to the radial dimension of the second cylinder 434, that is, the radial dimension of the entire inner cylinder 43 is consistent and easy to process.

[0072] Typically, reference Figure 6 and Figure 7 When the noodle machine is in operation, the second cylinder 434 exposed outside the outer cylinder is positioned inside the through hole 421 of the mold head cover 42, while the first cylinder 433 of the inner cylinder 43, located inside the outer cylinder 41, protrudes from the front end of the mold head cover 42. Therefore, in some preferred embodiments, based on the axial movement distance of the inner cylinder 43 not being less than the engagement distance between the extrusion screw 31 and the motor 11 or stirring rod 21, the ratio of the radial dimension of the second cylinder 434 to the radial dimension of the through hole 421 near the outer cylinder is set between 0.85 and 1.3, so that when the outer cylinder 41 is not installed, the extrusion screw 31 moves to the disengaged state under the action of the safety ejection mechanism 5.

[0073] For details, please refer to Figure 6 When the ratio is between 0.85 and 1.0, the radial dimension D2 of the second cylinder 434 is not greater than the radial dimension D1 of the through hole 421 near the outer cylinder. This means that if the outer cylinder is not installed, the safety ejection mechanism 5 acts on the inner cylinder 43 through the squeezing screw 31. When the squeezing screw 31 disengages, the inner cylinder 43 also disengages from the limiting position of the mold cover 42, ensuring the safety of the noodle machine. When the ratio is between 0.85 and 1.0, the radial dimension of the second cylinder 434 is greater than the radial dimension of the through hole 421 near the outer cylinder 41. This means that the mold cover 42 axially limits the inner cylinder 43, preventing the inner cylinder 43 from protruding through the through hole 421 of the mold cover 42. The advantage of this solution is that, in addition to ensuring safety, it also prevents the inner cylinder 43 from being ejected from the through hole 421 of the mold cover 42 due to excessive elasticity of the safety ejection mechanism, thus avoiding accidental injury to the user.

[0074] In some preferred implementation schemes, refer to Figures 7 to 10 The outer cylinder 41 has a stop ring extending radially outward along its side wall at its inlet end. The inner cylinder 43 includes a second cylinder body 434 exposed outside the outer cylinder 41. One end face of the stop ring 412 and the end face of the second cylinder body 434 form an axial fit, so that when the inner cylinder 43 is fitted inside the outer cylinder 41, it informs the user that the inner cylinder 43 and the outer cylinder 41 are in place when the end face of the second cylinder body 434 makes axial contact with the stop ring 412. The other end face of the stop ring 412 forms an axial fit with the die cap 42, and the stop ring 412 and the second cylinder body 42 are sandwiched between the extrusion cylinder 3 and the die cap 42. The advantage of this installation method is that if either the outer cylinder 41 or the inner cylinder 43 is missing, the remaining one is loosely installed on the extrusion cylinder 3, thereby providing space for the extrusion screw 31 to eject. Specifically, by setting the axial movement distance of the inner cylinder 43 to be equal to the axial thickness of the stop ring 412 when the outer cylinder 41 is missing, that is, the axial thickness of the stop ring 412 is not less than the engagement distance of the extrusion screw 31, it is ensured that the extrusion screw 31 can be smoothly ejected by the safety ejection mechanism 5 and is in a stopped rotation state, thereby ensuring the safety of the noodle machine. At the same time, since the second cylinder 434 of the inner cylinder 43 has axial limitation with the die head cover 42, even if the elastic force of the safety ejection mechanism 5 is too large, the extrusion screw 31 cannot eject the inner cylinder 43 from the die head cover 42 and accidentally injure the user.

[0075] Further reference Figure 7 When only the stop ring 412 is clamped between the die cap 42 and the extrusion cylinder 3, in order to ensure that the outer cylinder 41 can be reliably fixed on the extrusion cylinder 3, the locking distance L1 of the die cap 42 must not be greater than the sum of the axial locking distance L2 between the die cap 42 and the extrusion cylinder 3 and the axial thickness L3 of the stop ring 412. Preferably, 0mm≤(L2+L3)-L1≤2mm.

[0076] If (L2+L3)-L1>2mm, the die cap 42 needs to have greater strength to install the extrusion cylinder 3 and the outer cylinder 43 together, making installation more difficult for the user. If (L2+L3)-L1<0mm, after the die cap 42 installs the extrusion cylinder 3 and the outer cylinder 41 together, the large value of L1 results in a loose gap in the stop ring 412.

[0077] Understandably, when the second cylinder 434, which holds the stop ring 412 and the inner cylinder 43, between the die cap 42 and the extrusion cylinder 3, is held, the value of ((L2+L3)-L1) should not exceed the axial length of the second cylinder 434, preferably 2mm≤(L2+L3)-L1≤20mm. If (L2+L3)-L1>20mm, the axial length of the second cylinder 434 is too long, requiring an increase in the axial length of the extrusion cylinder 3, the extrusion screw 31, and the die cap 42, thus increasing costs. Since the second cylinder 434 can be used as a grip to facilitate the user's disassembly and assembly of the inner and outer cylinders, and it is nested with the extrusion cylinder 3 to radially position the inner cylinder 43, if (L2+L3)-L1<2mm, the axial length of the second cylinder 434 is too short, making it difficult for the user to hold the second cylinder 434 and disassemble the inner and outer cylinders. Moreover, the overlap length between the second cylinder 434 and the extrusion cylinder 3 is shortened, resulting in a weaker radial limiting force of the extrusion cylinder 3 on the inner cylinder 43, making it easier for the inner cylinder to slide out of the extrusion cylinder 3.

[0078] In some preferred embodiments, where the inner cylinder 43 and the die cap 42 are not fitted together (i.e., the inner cylinder 43 can protrude through the through hole 421 of the die cap 42 when the outer cylinder 41 is not installed), a first front end face 435 is provided on the side of the inner cylinder 43 facing the outer cylinder 41 to enhance the innermost layer of pressure exerted by the inner cylinder 43 on the extrusion screw 31 during operation and to ensure that the extrusion screw 31 is in a meshing transmission state. (Refer to...) Figure 9 and Figure 10 Meanwhile, the sealing connection between the first front end face 435 and the side wall of the inner cylinder 43 can prevent materials such as flour lint from overflowing from the gap between the first front end face 435 and the inner cylinder 43. More preferably, the sealing connection between the first front end face 435 and the side wall of the inner cylinder 43 means that the first front end face 435 and the inner cylinder 43 are integrally formed, or connected together by ultrasonic welding, screw fixing or other methods.

[0079] To further ensure the reliability of the axial pressure on the extrusion screw 31, a second front end face 414 is provided at the front end of the outer cylinder 43, which is sealed to the side wall of the outer cylinder 43. (Refer to...) Figure 10 The double-layer axial pressure exerted on the extrusion screw 31 by the first front end face 435 and the second front end face 414 ensures the stability of the extrusion screw 31 during operation.

[0080] Understandably, when the first front end face 435 is sufficient to axially press against the extrusion screw 31, the front end of the outer cylinder 43 can also be provided with a second front outlet 413 that is blocked by the first front end face 435, as shown in the reference. Figure 9 In this way, the outer cylinder 41 becomes an axially through-hole ring wall structure, which not only makes it convenient for users to insert cleaning tools into the outer cylinder to clean the outlet of the outlet area, but also saves on the cost of manufacturing the outer cylinder.

[0081] Furthermore, regardless of whether the front end of the outer cylinder 43 is provided with a second front end face 414 that is sealed and connected to the side wall of the outer cylinder 43, this solution also provides a positioning shaft 412 protruding towards the inside of the inner cylinder 43 on the first front end face 435, and a positioning groove 313 that cooperates with the positioning shaft 412 on the front end face of the extrusion screw 31, so as to achieve radial positioning of the inner cylinder 43 on the front end of the extrusion screw 31. On this basis, by coaxially arranging the extrusion screw 31, the inner cylinder 43, the positioning shaft 412, and the positioning groove 313, it is convenient for the inner cylinder 43 and the extrusion screw 21 to cooperate and install, and on the other hand, it makes the space between the extrusion screw 31 and the side wall of the inner cylinder 43 balanced, so that the force on the inner cylinder 43 is balanced during the dough making process, reducing the radial offset and shaking of the inner cylinder 43 and the extrusion screw 31. Meanwhile, the coaxially arranged extrusion screw 31 and inner cylinder 43 make it easier for the inner cylinder to move in a straight line when the outer cylinder 41 is missing, ensuring that the inner cylinder 43 will not get stuck on the die head cover 42 and hinder the extrusion screw 31 from popping out.

[0082] It is understandable that a positioning groove 313 can be provided on the first front end face 435, and a positioning shaft 412 can be provided on the front end face of the extrusion screw 31 to achieve radial positioning of the inner cylinder 43 on the front end of the extrusion screw 31.

[0083] In some preferred embodiments, to prevent the outer cylinder 41 from passing through the through hole 421 of the die cap 42, the outer cylinder 41 is designed to axially abut against the die cap 42 after passing through the through hole 421. Specifically, when 1mm ≤ D3-D1 ≤ 8mm, the axial contact area between the end of the die cap 42 near the outer cylinder 41 and the outer cylinder 41 can effectively fix the outer cylinder 41 to the extrusion cylinder 3, preventing the outer cylinder 41 from slipping out. When D3-D1 < 1mm, the axial contact area between the die cap 42 and the outer cylinder 41 is too small, and the strong torque of the extrusion screw 31 during the surface forming process can easily push the outer cylinder 41 out of the die cap 42, resulting in surface forming failure. When D3-D1>8mm, the axial contact area between the die head cover 42 and the outer cylinder 41 is too large, which requires increasing the size of the die head cover 42 and the outer cylinder 41, increasing costs, and also makes the installation of the outer cylinder 41 and the die head cover 42 difficult.

[0084] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of the present invention. All equivalent changes and modifications made in accordance with the present invention are covered by the scope of the claims of the present invention, and will not be listed here.

Claims

1. A high-safety pasta machine, comprising a main unit equipped with a motor, a safety ejection mechanism, a mixing chamber equipped with a stirring rod, an extrusion cylinder communicating with the mixing chamber, and a die head assembly connected to the extrusion cylinder, wherein an extrusion screw is installed inside the extrusion cylinder, and the die head assembly comprises an outer cylinder having a dough output area, an inner cylinder fitted inside the outer cylinder, and a die head cover having a through hole, wherein the side wall of the inner cylinder has an output port communicating with the dough output area, characterized in that, The outer cylinder, which is fitted with the inner cylinder, is installed with the extrusion cylinder through the die head cover. When the outer cylinder is not installed, the safety ejection mechanism acts on the inner cylinder through the extrusion screw to make the inner cylinder move axially. The axial movement distance is not less than the engagement distance of the extrusion screw, so that the extrusion screw moves to the disengaged state under the action of the safety ejection mechanism.

2. The high-safety pasta machine according to claim 1, characterized in that, The safety ejection mechanism, the extrusion screw, and the inner cylinder are coaxially arranged. When the outer cylinder is missing and the inner cylinder can pass through the through hole, the radial dimension of the inner cylinder is not greater than the minimum radial dimension of the through hole, so that the inner cylinder can be released from the limit of the die head cover. Alternatively, when the outer cylinder is missing and the inner cylinder cannot pass through the through hole, the inner cylinder can only move axially within the gap between the extrusion cylinder and the die head cover. The ratio of the engagement distance between the extrusion screw and the motor or stirring rod to the axial movement distance of the inner cylinder is between 0.5 and 1.

0.

3. A high-safety pasta machine according to claim 1 or 2, characterized in that, The inner cylinder includes a first cylinder body disposed inside the outer cylinder and a second cylinder body exposed outside the outer cylinder. The radial dimension of the first cylinder body is not greater than the radial dimension of the second cylinder body, and the radial dimension of the second cylinder body is not greater than the radial dimension of the through hole, so that the second cylinder body is positioned between the extrusion cylinder and the die head cover when the die head cover is installed to limit the outer cylinder.

4. The high-safety pasta machine according to claim 1, characterized in that, The inner cylinder includes a second cylinder body exposed outside the outer cylinder, and the ratio of the radial dimension of the second cylinder body to the radial dimension of the through hole on the side near the outer cylinder is between 0.85 and 1.

3.

5. A high-safety pasta machine according to claim 1 or 2, characterized in that, The diameter of the through hole near the outer cylinder is D1, and the maximum radial dimension of the inner cylinder is D2, where 0mm≤D1-D2≤5mm.

6. A high-safety pasta machine according to claim 5, characterized in that, The inner cylinder has a first front end face on the side facing the outer cylinder, and the first front end face is sealed to the side wall of the inner cylinder. The front end of the outer cylinder has a second front end face that is sealed to the side wall of the outer cylinder, or the front end of the outer cylinder has a second front outlet that is blocked by the first front end face.

7. A high-safety pasta machine according to claim 6, characterized in that, The first front end face is provided with a positioning shaft protruding towards the inside of the inner cylinder, and the front end face of the extrusion screw is provided with a positioning groove that cooperates with the positioning shaft. The extrusion screw, the inner cylinder, the positioning shaft, and the positioning groove are coaxially arranged.

8. A high-safety pasta machine according to claim 1 or 2, characterized in that, The inlet end of the outer cylinder is provided with a stop ring extending radially outward along the side wall of the outer cylinder. The inner cylinder includes a second cylinder body exposed outside the outer cylinder. The end face of the second cylinder body forms an axial fit with the stop ring. The stop ring and the second cylinder body are sandwiched between the extrusion cylinder and the die head cover. When the outer cylinder is not filled, the axial movement distance of the inner cylinder is equal to the axial thickness of the stop ring.

9. A high-safety pasta machine according to claim 8, characterized in that, The locking distance of the die head cover is L1, the axial locking distance between the die head cover and the extrusion cylinder is L2, and the axial thickness of the stop ring is L3, wherein 0mm≤(L2+L3)-L1≤20mm.

10. A high-safety pasta machine according to claim 1 or 2, characterized in that, The diameter of the through hole near the outer cylinder is D1, and the maximum radial dimension of the part of the outer cylinder that abuts against the mold head cover is D3, wherein 1mm≤D3-D1≤8mm.

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