Injection molding equipment for cake production

Abstract

The invention discloses injection molding equipment for cake production, the injection molding equipment comprises a conveying mechanism for conveying paper boxes and a slurry injection mechanism, the slurry injection mechanism comprises a material hopper, a shell, an opening and closing device and a discharging assembly, the shell is arranged between the material hopper and the discharging assembly, the shell is provided with a containing cavity, the opening and closing device comprises a rotating part and a first motor, and the rotating part is arranged in the containing cavity. The rotating part is arranged in the shell in a penetrating mode, the first motor drives the rotating part to rotate, the discharging assembly comprises a discharging nozzle, a discharging space is defined between an outlet of the discharging nozzle and the rotating part, when the rotating part rotates to a first position, the material hopper and the discharging assembly are in a conduction state, the volume of the discharging space is V1, and when the rotating part rotates to a second position, the volume of the discharging space is V1. The material hopper and the discharging assembly are in a closed state, the volume of the discharging space is V2, and V1 is smaller than V2. After grouting is finished, the size of the discharging space is increased, certain negative pressure is formed, and residual grout is sucked back into the discharging space.

Description

Technical Field

[0001] The present invention relates to the technical field of food processing machinery and equipment, in particular to an injection molding device for cake production. Background Art

[0002] Injection molding equipment is used to prepare cake batter, which is a mixture of flour, eggs, and oil in a specific proportion. The machine is equipped with a discharge nozzle, through which the cake batter is injected into a paper cake box at a fixed point and in a fixed quantity. In related art, after the batter is injected, the box continues to move forward. Due to the high viscosity of the cake batter, some residual batter will slowly drip under the influence of gravity, causing the batter to cling to the edges of the box, affecting the quality of the finished product. Some batter can even drip onto the conveyor mechanism, causing environmental pollution. Summary of the Invention

[0003] The present invention aims to solve at least one of the technical problems in the prior art. To this end, the present invention provides an injection molding device for cake production, which can prevent dripping after the injection is completed.

[0004] According to an embodiment of the present invention, an injection molding device for cake production includes a conveying mechanism for conveying paper boxes and a slurry injection mechanism, the slurry injection mechanism is used to inject slurry into the paper boxes, the slurry injection mechanism includes a material hopper, a shell, an opening and closing device and a discharge assembly, the shell is arranged between the material hopper and the discharge assembly, the shell is provided with a accommodating cavity, the accommodating cavity connects the material hopper and the discharge assembly, the opening and closing device includes a rotating member and a first motor, the rotating member is passed through the shell, at least part of the rotating member is located in the accommodating cavity, and the first motor drives the rotating member to rotate so that The material hopper and the discharging assembly are in a conducting state or a closed state with each other; the discharging assembly includes a discharging nozzle, and a discharging space is defined between the outlet of the discharging nozzle and the rotating member, and the size of the discharging space increases or decreases with the rotation of the rotating member; wherein, when the rotating member rotates to the first position, the material hopper and the discharging assembly are in a conducting state with each other, and the volume of the discharging space is V1; when the rotating member rotates to the second position, the material hopper and the discharging assembly are in a closed state with each other, and the volume of the discharging space is V2, and V1<V2.

[0005] According to an embodiment of the present invention, an injection molding device for cake production has at least the following beneficial effects: after the slurry injection is completed, the rotating part rotates from the first position to the second position, so that the volume of the discharge space increases, and the material hopper and the discharge assembly are in a closed state with each other, so that a certain negative pressure is formed in the discharge space, and the residual slurry is sucked back into the discharge space, thereby avoiding dripping.

[0006] According to some embodiments of the present invention, the shell is provided with a slide groove connected to the accommodating cavity, and the opening and closing device includes a slider and an elastic member, the slider is slidably arranged in the slide groove, the two ends of the elastic member respectively abut one end of the slider and the blind end of the slide groove, and the other end of the slider abuts the rotating member, and the rotating member is provided with a through hole for connecting the material hopper and the discharge assembly, the cross-section of the rotating member is elliptical, and the through hole passes through the rotating member along the long axis direction of the ellipse.

[0007] According to some embodiments of the present invention, an end surface of the sliding block abutting against the rotating member is arc-shaped and matches the shape of the end portion of the rotating member along the major axis direction of the ellipse.

[0008] According to some embodiments of the present invention, there are two slide grooves, which are symmetrically arranged on both sides of the rotating member, and each slide groove is provided with a group of the sliding blocks and the elastic member.

[0009] According to some embodiments of the present invention, the discharge nozzle includes a first tube portion and a second tube portion, the first tube portion is connected to the bottom of the shell, the second tube portion is sleeved on the outside of the first tube portion and can slide along the axial direction of the first tube portion, and the outlet of the discharge nozzle is located at an end of the second tube portion away from the first tube portion, and when the rotating member rotates from the first position to the second position, the second tube portion slides in a direction away from the shell.

[0010] According to some embodiments of the present invention, the injection molding apparatus includes a transmission mechanism connecting the first motor and the second tube portion, and the first motor drives the second tube portion to slide through the transmission mechanism.

[0011] According to some embodiments of the present invention, the transmission mechanism includes a gear and a rack, the length direction of the rack is arranged along the axis direction of the first tube part, and the rack is fixedly connected to the second tube part.

[0012] According to some embodiments of the present invention, the transmission mechanism includes a reel and a rope, the first motor drives the reel to rotate, the rope is wound around the reel and one end of the rope is fixedly connected to the second tube.

[0013] According to some embodiments of the present invention, the grouting mechanism is further provided with a one-way valve, the shell is provided with an air guide channel, the air guide channel is arranged obliquely upward, one end of the air guide channel is connected to the top of the discharge space, and the other end is connected to the one-way valve, the air guide channel is configured to prevent slurry from entering under the action of liquid surface tension, and the one-way valve is configured to allow gas to be discharged from the air guide channel to the outside of the shell, and to prevent gas outside the shell from entering the air guide channel.

[0014] According to some embodiments of the present invention, the grouting mechanism also includes a feed assembly, which is located between the material hopper and the shell, and the feed assembly includes a feed shell, a first feed shaft, a second feed shaft and a second motor. The feed shell is provided with a feed cavity, the upper end of the feed cavity is connected to the material hopper, and the lower end is connected to the discharge space. The first feed shaft and the second feed shaft are arranged in parallel in the feed cavity. The first feed shaft and the second feed shaft are both provided with a plurality of key teeth arranged along the axial direction of the first feed shaft, and a key groove is formed between two adjacent key teeth. The key teeth of the first feed shaft cooperate with the key groove of the second feed shaft. The second motor drives the first feed shaft to rotate, and the first feed shaft drives the second feed shaft to rotate.

[0015] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which: Figure 1 A schematic diagram of an injection molding device for cake production according to an embodiment of the present invention; Figure 2 for Figure 1 A schematic diagram of a grouting mechanism is shown; Figure 3 for Figure 2 A cross-sectional view of an embodiment of a grouting mechanism is shown (the rotating member is rotated to a first position); Figure 4 for Figure 3 A cross-sectional view of the grouting mechanism is shown (the rotating member is rotated to the second position); Figure 5 for Figure 2 A cross-sectional view of another embodiment of a grouting mechanism is shown; Figure 6 for Figure 2 A cross-sectional view of another embodiment of the grouting mechanism is shown (the rotating member is rotated to the first position); Figure 7 for Figure 6 A cross-sectional view of the grouting mechanism is shown (the rotating member is rotated to the second position); Figure 8 for Figure 2 A cross-sectional view of another embodiment of the grouting mechanism is shown (the rotating member is rotated to the first position); Figure 9 for Figure 8 A cross-sectional view of the grouting mechanism is shown (the rotating member is rotated to the second position).

[0017] Reference numerals: 110. Carton; 120. Conveying mechanism; 200, grouting mechanism; 210, material hopper; 220, housing; 221, accommodating chamber; 222, second portion; 223, discharge space; 224, air guide channel; 230, discharge assembly; 231, discharge nozzle; 232, first portion; 233, first pipe portion; 234, second pipe portion; 241, rotating member; 242, first motor; 243, feed hole; 244, slider; 245, elastic member; 250, one-way valve; 260, feed housing; 261, feed chamber; 270, first feed shaft; 271, key teeth; 272, keyway; 280, second feed shaft; 290, second motor; 310. Gear; 320. Rack; 330. Reel; 340. Rope. DETAILED DESCRIPTION

[0018] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0019] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present invention.

[0020] In the description of the present invention, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The use of "first" and "second" in the description is solely for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, implicitly specifying the number of the indicated technical features, or implicitly specifying the order of the indicated technical features.

[0021] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0022] Reference Figure 1 and Figure 2As shown, an injection molding device for cake production according to an embodiment of the present invention comprises a conveying mechanism 120 for conveying a paper box 110 and a slurry injection mechanism 200, wherein the slurry injection mechanism 200 is used to inject slurry into the paper box 110. Figures 1 to 3 As shown, the slurry injection mechanism 200 includes a material hopper 210, a shell 220 and a discharge assembly 230. The shell 220 is arranged between the material hopper 210 and the discharge assembly 230. The shell 220 is provided with a accommodating chamber 221. The accommodating chamber 221 connects the material hopper 210 and the discharge assembly 230. The slurry of the cake paste enters from the top entrance of the material hopper 210, reaches the bottom of the material hopper 210, enters the accommodating chamber 221, and finally flows out from the discharge assembly 230 and is injected into the paper box 110. The conveying mechanism 120 then conveys the paper box 110 filled with slurry to the next process for processing.

[0023] Reference Figure 2 and Figure 3 As shown, the grouting mechanism 200 also includes an opening and closing device, which is used to control whether the material hopper 210 and the discharge assembly 230 are in a conductive state or a closed state. When the material hopper 210 and the discharge assembly 230 are in the conductive state, the cake batter slurry flows from the material hopper 210 to the discharge assembly 230. When the material hopper 210 and the discharge assembly 230 are in the closed state, the slurry in the material hopper 210 is blocked by the opening and closing device and cannot pass through the opening and closing device. Finally, no slurry flows out of the discharge assembly 230, and the grouting ends.

[0024] Reference Figure 2 and Figure 3 As shown, the opening and closing device includes a rotating member 241 and a first motor 242. The rotating member 241 is disposed through the housing 220, with at least a portion of the rotating member 241 located within the accommodating chamber 221. The first motor 242 drives the rotating member 241 to rotate. The rotating member 241 is provided with a through hole 243 for connecting the material hopper 210 and the discharge assembly 230. The through hole 243 extends through the rotating member 241. When the rotating member 241 rotates to the first position, the through hole 243 is arranged vertically, and the slurry flows from above the through hole 243 to below the through hole 243, and the material hopper 210 and the discharge assembly 230 are in a conductive state. When the rotating member 241 rotates to the second position, the through hole 243 is arranged horizontally, and the rotating member 241 blocks the liquid discharge path from the material hopper 210 to the discharge assembly 230, and the material hopper 210 and the discharge assembly 230 are in a closed state.

[0025] Reference Figure 3 and Figure 4As shown, the discharge assembly 230 includes a discharge nozzle 231, and a discharge space 223 is defined between the outlet of the discharge nozzle 231 and the rotating member 241. The discharge space 223 includes a first part 232 and a second part 222. The first part 232 is a liquid outlet channel in the discharge nozzle 231, and the rotating member 241 separates the accommodating chamber 221 into two upper and lower spaces. The second part 222 is the space below the rotating member 241 in the accommodating chamber 221, that is, the bottom of the second part 222 is the top of the discharge nozzle 231, the top of the second part 222 is the bottom surface of the rotating member 241, and the peripheral wall of the second part 222 is part of the peripheral wall of the accommodating chamber 221.

[0026] Reference Figure 3 and Figure 4 As shown, in one embodiment, the cross-section of the rotating member 241 is elliptical, the material hole 243 passes through the rotating member 241 along the long axis direction of the ellipse, the shell 220 is provided with a slide groove connected to the accommodating cavity 221, and the opening and closing device includes a slider 244 and an elastic member 245. The slider 244 is slidably set in the slide groove, and the two ends of the elastic member 245 respectively abut one end of the slider 244 and the blind end of the slide groove, and the other end of the slider 244 abuts the rotating member 241.

[0027] Reference Figure 3 As shown, the rotating member 241 is rotated to the first position. The left-right width of the rotating member 241 is relatively short, allowing the slider 244 to move toward the accommodating chamber 221. This allows the slider 244 to occupy part of the space of the accommodating chamber 221, thereby reducing the space of the accommodating chamber 221. However, the vertical width of the rotating member 241 is relatively long, and the rotating member 241 occupies more space below, resulting in a smaller space in the second portion 222 and a relatively small volume of the discharge space 223.

[0028] Reference Figure 4 As shown, when the rotating member 241 rotates to the first position, the left-right width of the rotating member 241 is longer, allowing the slider 244 to move into the chute, thereby shortening the length of the slider 244 entering the accommodating cavity 221. Therefore, the space in the accommodating cavity 221 is increased. However, the vertical width of the rotating member 241 is shorter, and the rotating member 241 occupies less space below, resulting in a larger space in the second portion 222 and a relatively smaller discharge space 223, resulting in a relatively larger volume of the discharge space 223.

[0029] During the working process of the injection molding device, when the paper box 110 moves to the bottom of the discharge nozzle 231, the first motor 242 drives the rotating member 241 to rotate, and the slurry injection mechanism 200 is Figure 4 The state shown transitions to Figure 3In the state shown, the material hole 243 connects the material hopper 210 and the discharge nozzle 231, so that the slurry is injected into the paper box 110 through the discharge nozzle 231. As the width of the rotating member 241 in the left and right directions gradually decreases, the slider 244 gradually extends from the chute, and the effective space of the accommodating cavity 221 decreases, so that the slurry enters the paper box 110 through the discharge nozzle 231 more quickly, thereby improving the grouting efficiency. When the grouting is completed, the first motor 242 drives the rotating member 241 to rotate, and the grouting mechanism 200 is rotated. Figure 3 The state shown transitions to Figure 4 In the state shown, the rotating member 241 pushes the slider 244 to retract, increasing the effective space of the accommodating chamber 221 while reducing the space below the rotating member 241, thereby increasing the discharge space 223. Due to the increase in space, the pressure inside the discharge space 223 is lower than atmospheric pressure. Under the influence of the external atmospheric pressure, the slurry at the outlet edge of the discharge nozzle 231 can overcome gravity and be sucked back into the discharge space 223, preventing residual slurry from dripping and hanging on the edge of the paper box 110 or dripping onto the conveying mechanism 120.

[0030] It is understood that the size of the discharge space 223 increases or decreases with the rotation of the rotating member 241, which can synchronize the grouting process with the change of the discharge space 223. This can reduce the number of control components and reduce costs, while also maintaining high control accuracy. The increase in the discharge space 223 facilitates the reabsorption of residual slurry, improving the grouting quality, while the decrease in the discharge space 223 reduces the amount of slurry remaining in the process, which helps improve the efficiency of grouting.

[0031] It is understandable that the end surface of the slider 244 that abuts against the rotating member 241 is arc-shaped and matches the end shape of the rotating member 241 along the elliptical major axis direction. Figure 4 In the state shown, the slider 244 can be close to the edge of the rotating member 241, thereby improving the sealing performance and preventing the slurry above the rotating member 241 from leaking to the bottom of the rotating member 241, which may cause the slurry in the discharge space 223 to increase and drip. At the same time, the negative pressure effect of the discharge space 223 is improved, which is conducive to keeping the slurry in the discharge space 223. In addition, when the grouting machine is in Figure 3 In the state shown, the contact area between the slider 244 and the rotating member 241 is small, which reduces the rotation resistance of the rotating member 241. The grouting mechanism 200 is Figure 3 The state shown transitions to Figure 4 In the state shown, the rotating member 241 is in Figure 3 When the rotation starts in the state shown, the volume change rate of the discharge space 223 is the largest, which is convenient for quickly sucking back the remaining slurry.

[0032] Reference Figure 3 and Figure 4As shown, there are two chutes, which are symmetrically arranged on both sides of the rotating member 241. Each chute is provided with a set of sliders 244 and elastic members 245. By providing two sets of sliders 244 and elastic members 245, the range of change of the discharge space 223 can be increased, thereby improving the effect of sucking the slurry at the outlet edge of the discharge nozzle 231 back into the discharge space 223.

[0033] It is understandable that when the residual slurry is sucked back, some gas may be sucked into the discharge space 223, forming bubbles in the slurry. During the next grouting, the bubbles may burst and cause slurry splashing.

[0034] To solve the above problems, refer to Figure 5 As shown, the grouting mechanism 200 is also equipped with a one-way valve 250. The housing 220 is provided with an air channel 224. The air channel 224 is tilted upward, that is, the axis of the air channel 224 forms a specific angle (e.g., 15° to 45°) with the horizontal plane. The lower end of the air channel 224 is connected to the top of the discharge space 223, and the upper end is connected to the one-way valve 250. The upward tilt of the air channel 224 facilitates the smooth discharge of gas under its own buoyancy, allowing gas generated during the grouting process to be promptly discharged from the housing 220, preventing gas accumulation from affecting the grouting effect. At the same time, it avoids gas interference with the slurry flow under high pressure, ensuring the smooth progress of the grouting process. The air channel 224 is configured to prevent slurry from entering under the action of liquid surface tension. In particular, the inner wall of the air channel 224 is treated with a hydrophobic and oleophilic coating, and the air channel 224 has a small aperture. Combined with its tilted structural design, it can effectively utilize the surface tension of the slurry to form a physical barrier. The small aperture and material properties of the air guide channel 224 utilize the liquid surface tension of the slurry to prevent the slurry from entering the channel due to capillary action or slight pressure. In addition, the upwardly inclined structure of the air guide channel 224 itself provides a certain physical barrier effect. The one-way valve 250 is configured to allow gas to be discharged from the air guide channel 224 to the outside of the shell 220, and to prevent gas outside the shell 220 from entering the air guide channel 224. Through the cooperation of the air guide channel 224 and the one-way valve 250, the slurry is prevented from entering the air guide channel 224 under the action of the liquid surface tension, thereby avoiding the phenomenon of slurry flowing back to the air guide channel 224 during the grouting process, ensuring the continuity and stability of the grouting, and improving the grouting quality. Then, by timely discharging the gas, the discharge pulsation, interruption or jetting caused by the gas accumulation pressure is avoided, which significantly improves the stability of the grouting process and the precise control of the grouting amount.

[0035] During the grouting pressurization phase, slurry enters the discharge space 223 from the material hopper 210, significantly increasing the pressure within the discharge space 223. The one-way valve 250 opens, allowing gas at the top of the discharge space 223 to flow out of the one-way valve 250 through the air channel 224. The slurry cannot pass through the air channel 224 and can only flow downward through the discharge nozzle 231, achieving liquid and gas diversion. When the grouting is completed, the volume of the discharge space 223 increases, forming a negative pressure. The one-way valve 250 closes, preventing outside air from entering the air channel 224 through the one-way valve 250. The slurry and air are sucked back into the discharge space 223. The air dissolved in the slurry gathers toward the top due to the pressure difference, and partially enters the air channel 224. The slurry is blocked at the lower end of the air channel 224 by the liquid surface tension.

[0036] Reference Figures 2 to 5 As shown, the grouting mechanism 200 also includes a feed assembly, which is located between the material hopper 210 and the housing 220. The feed assembly includes a feed shell 260, a first feed shaft 270, a second feed shaft 280, and a second motor 290. The feed shell 260 is provided with a feed cavity 261 that passes through the upper and lower parts. The upper end of the feed cavity 261 is connected to the discharge port of the material hopper 210, and the lower end is connected to the discharge space 223. The first feed shaft 270 and the second feed shaft 280 are arranged parallel to each other in the feed cavity 261. The first feed shaft 270 and the second feed shaft 280 are both provided with a plurality of raised key teeth 271 along their axial direction (length direction), and recessed key slots 272 are formed between adjacent key teeth 271. The first feed shaft 270 and the second feed shaft 280 are both provided with a plurality of key teeth 271 arranged along the axial direction of the first feed shaft 270, with a key slot 272 formed between two adjacent key teeth 271. The key teeth 271 on the first feed shaft 270 are precisely inserted into and meshed with the key slots 272 of the second feed shaft 280. At the same time, the key teeth 271 on the second feed shaft 280 are also correspondingly inserted into and meshed with the key slots 272 of the first feed shaft 270. The second motor 290 drives the first feed shaft 270 to rotate. Since the first feed shaft 270 and the second feed shaft 280 are tightly meshed through the key teeth 271-key slot 272 structure, when the first feed shaft 270 is driven to rotate, it will force the second feed shaft 280 to rotate synchronously in the opposite direction.

[0037] The tightly meshed key teeth 271 and key slots 272 on the first feed shaft 270 and the second feed shaft 280 cooperate with each other during rotation to form a continuous, dynamic sealing line in the axial direction (length direction) of the feed chamber 261. During grouting, the first feed shaft 270 and the second feed shaft 280 cooperate to, on the one hand, play a stirring role, allowing the slurry to be mixed more evenly, and on the other hand, to increase the pressure in the discharge space 223, increase the grouting speed, and improve efficiency. When the grouting is completed, the first feed shaft 270 and the second feed shaft 280 are reversed or remain stationary, so that the pressure in the space between the rotating part 241 and the first feed shaft 270 and the second feed shaft 280 is approximately equal to the pressure in the discharge space 223, reducing the flow of slurry into the discharge space 223 from above, so that the discharge space 223 can better suck back the slurry remaining in the discharge nozzle 231.

[0038] Reference Figures 6 to 9 As shown, in another embodiment, the discharge nozzle 231 includes a first tube portion 233 and a second tube portion 234. The first tube portion 233 is connected to the bottom of the housing 220, and the second tube portion 234 is sleeved on the outside of the first tube portion 233 and can slide along the axis of the first tube portion 233. The connection between the first tube portion 233 and the second tube portion 234 is sealed, for example, a sealing ring is provided on the inner side wall of the second tube portion 234. The outlet of the discharge nozzle 231 is located at the end of the second tube portion 234 away from the first tube portion 233. When the rotating member 241 rotates from the first position to the second position, the second tube portion 234 slides in a direction away from the housing 220, so that the outlet of the discharge nozzle 231 is away from the first tube portion 233, thereby increasing the volume between the outlet of the discharge nozzle 231 and the first tube portion 233, reducing the pressure at this position, and facilitating the slurry at the edge of the discharge nozzle 231 to be sucked back into the discharge nozzle 231. During grouting, the second tube portion 234 slides toward the housing 220 , shortening the distance between the outlet of the discharge nozzle 231 and the first tube portion 233 , that is, shortening the grouting distance, thereby improving the grouting efficiency.

[0039] The injection molding device includes a transmission mechanism that connects the first motor 242 and the second tube 234. The first motor 242 drives the second tube 234 to slide through the transmission mechanism. It is understandable that since the rotating member 241 and the second tube 234 are both driven by the first motor 242, the size of the discharge space 223 will increase or decrease with the rotation of the rotating member 241, which can keep the grouting and the transformation of the discharge space 223 synchronized. On the one hand, it can reduce the number of control parts and reduce costs, and on the other hand, it can maintain a high level of control accuracy. The increase in the discharge space 223 is conducive to the reabsorption of residual slurry and improves the quality of grouting. The reduction in the discharge space 223 reduces the slurry's stay in the middle, which is conducive to improving the efficiency of grouting.

[0040] In some other embodiments, the second tube portion 234 may also be driven by another driving mechanism, such as a separately provided cylinder, which drives the second tube portion 234 to extend and retract.

[0041] Reference Figure 6 and Figure 7 As shown, in some embodiments, the transmission mechanism includes a gear 310 and a rack 320. The length direction of the rack 320 is arranged along the axis direction of the first tube portion 233, and the rack 320 is fixedly connected to the second tube portion 234. When the first motor 242 drives the gear 310 to rotate, the gear 310 drives the rack 320 to move along its length direction, thereby driving the second tube portion 234 to slide along the axis direction of the first tube portion 233. Figure 6 The state of the discharge nozzle 231 when the rotating member 241 rotates to the second position is shown in FIG. Figure 7 This is the state of the discharge nozzle 231 when the rotating member 241 rotates to the first position.

[0042] Reference Figure 8 and Figure 9 As shown, in some embodiments, the transmission mechanism includes a reel 330 and a rope 340. The first motor 242 drives the reel 330 to rotate. The rope 340 is wound around the reel 330 and one end of the rope is fixedly connected to the second tube 234. When the first motor 242 drives the reel 330 to rotate, the rope 340 is wound or released, thereby driving the second tube 234 to slide along the axis of the first tube 233. Figure 8 The state of the discharge nozzle 231 when the rotating member 241 rotates to the second position is shown in FIG. Figure 9 This is the state of the discharge nozzle 231 when the rotating member 241 rotates to the first position.

[0043] It should be noted that Figures 6 to 9 In the embodiment of the present invention, the rotating member 241 can be Figure 3 and Figure 4 The oval structure shown can also be used Figure 5 The circular structure shown.

[0044] In summary of the above embodiments, the size of the discharge space 223 increases or decreases as the rotating member 241 rotates. The size change of the discharge space 223 can be achieved by changing the size of the first portion 232 and / or the second portion 222. When the rotating member 241 rotates to the first position, the material hopper 210 and the discharge assembly 230 are in a conductive state with each other, and the volume of the discharge space 223 is V1. When the rotating member 241 rotates to the second position, the material hopper 210 and the discharge assembly 230 are in a closed state with each other, and the volume of the discharge space 223 is V2, where V1 < V2. After grouting is completed, the rotating member 241 rotates from the first position to the second position, increasing the volume of the discharge space 223 and closing the material hopper 210 and the discharge assembly 230. This creates a certain negative pressure in the discharge space 223, sucking the remaining slurry back into the discharge space 223, thereby preventing dripping.

[0045] Figure 3 and Figure 4 The control method of the grouting mechanism shown includes: Step S100: Control the first motor to rotate forward until the material through hole is changed from a horizontal direction to a vertical direction, and control the second motor to rotate reversely at the same time.

[0046] It is understandable that when the feed hole is changed from a horizontal to a vertical orientation, the pressure in the space between the rotating member and the first and second feed shafts increases, which will hinder the rotation of the rotating member. While the rotating member is rotating, controlling the second motor to reverse can reduce the pressure in the space between the rotating member and the first and second feed shafts, reducing the resistance to the rotating member's rotation and facilitating the rotating member's rotation into place. At the same time, it can also create a pressure difference between the upper and lower sides of the rotating member, so that the slurry in the discharge space is subjected to an upward suction force, which is less likely to cause dripping.

[0047] Furthermore, when the first motor rotates forward, the empty paper box is approaching the discharge nozzle but has not reached directly below the discharge nozzle. The discharge state can be adjusted in advance to avoid the need to wait for the rotating part to rotate after the paper box reaches the predetermined position, thereby improving work efficiency.

[0048] Step S200: After the material passage hole is set in the vertical direction, the second motor is controlled to rotate forward.

[0049] It is understood that the forward rotation of the second motor can continuously transport the slurry in the material hopper to the discharge space, and can increase the pressure in the discharge space, thereby increasing the discharge speed of the slurry. When the second motor rotates forward, the empty paper box has reached the predetermined position and is located directly below the discharge nozzle.

[0050] Step S300: Control the second motor to be turned off, control the first motor to be turned on, and make the rotating member first reverse by a first preset angle and then rotate forward by a second preset angle.

[0051] It can be understood that by continuously rotating forward and reverse, the pressure in the discharging space can be continuously reduced and then increased, so that the slurry at the edge of the discharging nozzle can shake faster and some of the slurry that is easy to drip can be thrown out. At this time, the paper box is still directly below the discharging nozzle.

[0052] Step S400: Control the first motor to rotate in reverse until the material passage hole is set in a horizontal direction.

[0053] It is understandable that after the first motor is reversed, the grouting mechanism is Figure 3 The state shown transitions to Figure 4 The state shown expands the volume of the discharge space and reduces the pressure in the discharge space, which helps to suck back the slurry remaining at the discharge nozzle and keep the slurry in the discharge space.

[0054] The embodiments of the present invention are described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various changes can be made within the knowledge of ordinary technicians in the relevant technical field without departing from the scope of the present invention.

Claims

1. An injection molding device for cake production, characterized in that: include: A conveying mechanism, used for conveying cartons; A grouting mechanism is used to inject slurry into the paper box, and the grouting mechanism includes a material hopper, a shell, an opening and closing device and a discharge assembly. The shell is arranged between the material hopper and the discharge assembly, and the shell is provided with a accommodating chamber, and the accommodating chamber communicates with the material hopper and the discharge assembly. The opening and closing device includes a rotating member and a first motor. The rotating member passes through the shell, and at least part of the rotating member is located in the accommodating chamber. The first motor drives the rotating member to rotate so that the material hopper and the discharge assembly are in a conductive state or a closed state with each other; the discharge assembly includes a discharge nozzle, and a discharge space is defined between the outlet of the discharge nozzle and the rotating member, and the size of the discharge space increases or decreases with the rotation of the rotating member; Among them, when the rotating part rotates to the first position, the material hopper and the discharging assembly are in a conductive state with each other, and the volume of the discharging space is V1; when the rotating part rotates to the second position, the material hopper and the discharging assembly are in a closed state with each other, and the volume of the discharging space is V2, V1<V2.

2. The injection molding equipment for cake production according to claim 1, characterized in that The shell is provided with a slide groove connected to the accommodating cavity, and the opening and closing device includes a slider and an elastic member. The slider is slidably arranged in the slide groove, and the two ends of the elastic member respectively abut one end of the slider and the blind end of the slide groove, and the other end of the slider abuts the rotating member. The rotating member is provided with a through hole for connecting the material hopper and the discharge assembly. The cross-section of the rotating member is elliptical, and the through hole passes through the rotating member along the long axis direction of the ellipse.

3. The injection molding equipment for cake production according to claim 2, characterized in that: The end surface of one end of the sliding block abutting against the rotating member is arc-shaped and is adapted to the end shape of the rotating member along the major axis direction of the ellipse.

4. The injection molding equipment for cake production according to claim 2 or 3, characterized in that: There are two slide grooves, which are symmetrically arranged on both sides of the rotating member. A group of the sliding blocks and the elastic member are arranged in each slide groove.

5. The injection molding equipment for cake production according to claim 1, characterized in that: The discharge nozzle includes a first tube portion and a second tube portion, the first tube portion is connected to the bottom of the shell, the second tube portion is sleeved on the outside of the first tube portion and can slide along the axial direction of the first tube portion, and the outlet of the discharge nozzle is located at an end of the second tube portion away from the first tube portion. When the rotating member rotates from the first position to the second position, the second tube portion slides in the direction away from the shell.

6. The injection molding equipment for cake production according to claim 5, characterized in that: The injection molding device includes a transmission mechanism, which connects the first motor and the second pipe part, and the first motor drives the second pipe part to slide through the transmission mechanism.

7. The injection molding equipment for cake production according to claim 6, characterized in that: The transmission mechanism includes a gear and a rack. The length direction of the rack is arranged along the axial direction of the first tube part, and the rack is fixedly connected to the second tube part.

8. The injection molding equipment for cake production according to claim 6, characterized in that: The transmission mechanism includes a reel and a rope. The first motor drives the reel to rotate. The rope is wound around the reel and one end of the rope is fixedly connected to the second pipe.

9. The injection molding equipment for cake production according to claim 1, characterized in that: The grouting mechanism is also provided with a one-way valve, and the shell is provided with an air guide channel, which is arranged to be inclined upward. One end of the air guide channel is connected to the top of the discharge space, and the other end is connected to the one-way valve. The air guide channel is configured to prevent slurry from entering under the action of liquid surface tension, and the one-way valve is configured to allow gas to be discharged from the air guide channel to the outside of the shell, and to prevent gas outside the shell from entering the air guide channel.

10. The injection molding equipment for cake production according to claim 1, characterized in that: The grouting mechanism also includes a feed assembly, which is located between the material hopper and the shell. The feed assembly includes a feed shell, a first feed shaft, a second feed shaft and a second motor. The feed shell is provided with a feed cavity, the upper end of the feed cavity is connected to the material hopper, and the lower end is connected to the discharge space. The first feed shaft and the second feed shaft are arranged in parallel in the feed cavity. The first feed shaft and the second feed shaft are both provided with a plurality of key teeth arranged along the axial direction of the first feed shaft, and a key groove is formed between two adjacent key teeth. The key teeth of the first feed shaft cooperate with the key groove of the second feed shaft. The second motor drives the first feed shaft to rotate, and the first feed shaft drives the second feed shaft to rotate.

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