A spiral forming machine for processing a sandwiched ice cream stick

Abstract

This utility model discloses a spiral forming machine for processing sandwich milk sticks. The technical solution is as follows: it includes a spiral extrusion forming machine, the front end of which is connected to a mixing box. A connecting crossbar is set in the center of the mixing box, and multiple forming extrusion tubes are inserted into the connecting crossbar. A core material feeding system for feeding the core material in the center is set on the upper part of the multiple forming extrusion tubes. By connecting the front end of the spiral extrusion forming machine for processing milk sticks to the mixing box, and setting the connecting crossbar and forming extrusion tubes in the mixing box, and cooperating with the core material feeding system, this utility model realizes the synchronous and precise filling of the core material and the outer shell material. It has the advantages of reducing equipment purchase costs, simplifying the production process, reducing the floor space, and preventing core material leakage.

Description

Technical Field

[0001] This utility model relates to the field of food processing machinery, specifically to a spiral forming machine for processing sandwich milk sticks. Background Technology

[0002] Milk sticks, a popular dairy product, are traditionally made by mixing various ingredients such as milk powder, high-gluten flour, granulated sugar, and water, and then processing them through molding equipment. While spiral extrusion molding machines currently on the market can achieve continuous production of basic milk sticks, they have significant limitations when processing filled milk stick products.

[0003] Existing equipment for processing milk sticks using extrusion molding employs a screw extrusion molding machine, which is equipped with only a simple screw extrusion mechanism. After feeding through the upper hopper, the material is extruded and conveyed by double-spiral blade rollers, and finally extruded through multiple parallel extrusion tubes (e.g., Figure 4 (As shown). This structural design makes it impossible for the equipment to achieve synchronous and precise injection of core material and outer shell material. When producing sandwich products, it is necessary to purchase special core injection equipment, which not only increases the company's equipment procurement costs, but also causes problems such as complicated production processes and increased floor space. Utility Model Content

[0004] To address the aforementioned problems, this utility model provides a spiral forming machine for processing sandwich milk sticks.

[0005] This utility model is achieved through the following technical solution:

[0006] This application provides a spiral forming machine for processing sandwich milk sticks, the technical solution of which is as follows: it includes a spiral extrusion forming machine, the front end forming outlet of the spiral extrusion forming machine is connected to a mixing box, a connecting crossbar is provided in the center of the mixing box, a plurality of forming extrusion tubes are inserted into the connecting crossbar, and a core material feeding system for feeding the internal central sandwich material is provided on the upper part of the plurality of forming extrusion tubes.

[0007] Furthermore, this application also proposes that a sealing end plate is fixedly connected to the front end face of the mixing box, and a plurality of insertion holes corresponding to the molding extrusion tubes are opened in the middle of the sealing end plate, and a sealing ring for sealing the molding extrusion tubes is provided inside the insertion holes.

[0008] Furthermore, this application also proposes that the core material feeding system includes multiple feeding pipes that are longitudinally fixed to the upper part of the connecting crossbar and correspond to the forming extrusion tube, and the outlet end of the feeding pipe extends downward into the center of the interior of the forming extrusion tube.

[0009] Furthermore, the discharge end of the feed tube is set with a tapered guide bend along the discharge direction of the forming extrusion tube.

[0010] Furthermore, this application also proposes that the upper end of the feeding pipe extends to the outside of the mixing chamber and is connected to the control valve, and the inlet of the control valve is connected and fixed to the connecting pipe through a transparent flexible tube.

[0011] Furthermore, this application also proposes that the connecting pipe is connected and fixed to the mixing chamber via a lower bracket, and the side inlet end of the connecting pipe is connected and fixed to the outlet of the core material press via a pipeline.

[0012] Furthermore, this application also proposes that the lower part of the connecting crossbar is fixedly connected to the lower end wall of the mixing tank by multiple fixing rods.

[0013] Compared with existing technologies, the advantages of this utility model are: by connecting the front end of the spiral extrusion molding machine for processing milk sticks to the mixing box, and setting a connecting crossbar and molding extrusion pipe in the mixing box, and in conjunction with the core material feeding system, the synchronous and precise filling of the core material and the outer shell material is achieved. This has the advantages of reducing equipment procurement costs, simplifying the production process, reducing the floor space occupied, and preventing core material leakage. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the main structure of this utility model;

[0015] Figure 2 This is a three-dimensional schematic diagram of the internal structure of this practical hybrid box;

[0016] Figure 3 This is a schematic diagram of the mixing of milk sticks and core material inside the practical molding extrusion tube;

[0017] Figure 4 This is a schematic diagram of an existing spiral extrusion molding machine.

[0018] In the diagram: 1. Screw extrusion molding machine; 2. Extrusion chamber; 3. Screw blade roller; 4. Molding extrusion tube; 5. Mixing box; 6. Connecting crossbar; 61. Fixing rod; 7. Feeding pipe; 8. Control valve; 9. Transparent hose; 10. Connecting pipe; 11. Support; 12. Sealing end plate; 13. Insertion hole; 14. Milk stick material; 15. Sandwich material. Detailed Implementation

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments:

[0020] like Figure 1 As shown, this application proposes a spiral forming machine for processing sandwich milk sticks, including a spiral extrusion forming machine. The front end forming outlet of the spiral extrusion forming machine is connected to a mixing box. A connecting crossbar is set in the center of the mixing box. Multiple forming extrusion tubes are inserted into the connecting crossbar. A core material feeding system for feeding the internal central sandwich material is set on the upper part of the multiple forming extrusion tubes.

[0021] A spiral extrusion molding machine is used to extrude raw materials for milk sticks. The mixing chamber receives the extruded raw materials and processes them further. A connecting crossbar is located in the center of the mixing chamber and secures multiple forming extrusion tubes. These tubes extrude the raw materials into milk sticks of a specific shape. A core material feeding system feeds the core material into the center of the forming extrusion tubes, thus enabling the processing of cored milk sticks. Specifically, the mixing chamber can be made of stainless steel for easy cleaning and maintenance. The connecting crossbar can be fixed inside the mixing chamber by welding or bolting. The number and arrangement of the forming extrusion tubes can be adjusted according to production needs, for example, in a single or multiple row arrangement. The core material feeding system can use pressure feeding, which allows for more precise control of the core material delivery rate.

[0022] This technical solution achieves continuous production of sandwich milk sticks by incorporating a mixing chamber and a core material feeding system at the outlet of a spiral extrusion molding machine. The mixing chamber receives the milk stick raw material extruded from the spiral extrusion molding machine and shapes it through a forming extrusion tube. Simultaneously, the core material feeding system transports the core material to the center of the forming extrusion tube, thus forming the sandwich milk stick. This technical solution solves the problem that existing spiral extrusion molding machines cannot process sandwich milk sticks, enabling sandwich milk stick production without the need for additional equipment purchases, thereby reducing production costs for enterprises. Compared with existing technologies, this technical solution has advantages such as simple structure, convenient operation, and high production efficiency.

[0023] like Figure 2 As shown, this application further proposes that a sealing end plate is fixedly connected to the front end face of the mixing box, and a number of insertion holes corresponding to the molding extrusion tubes are opened in the middle of the sealing end plate, and a sealing ring for sealing the molding extrusion tubes is provided inside the insertion holes.

[0024] Specifically, the sealing end plate is rigidly connected to the front face of the mixing chamber by bolt fastening. The insertion hole is CNC machined, and its diameter is 0.1-0.2mm larger than the outer diameter of the extruded tube to achieve a transition fit. The sealing ring is preferably made of silicone rubber, with an O-shaped or rectangular cross-section, and is fixed to the inner wall of the insertion hole by groove embedding. As a preferred embodiment, the sealing end plate can be made of 304 stainless steel integral casting, with a thickness controlled at 15-20mm to ensure structural strength.

[0025] Therefore, this technical solution effectively solves the leakage problem of sandwich material during high-pressure extrusion through the combination of a sealing end plate and a sealing ring. The precise fit between the insertion hole and the forming extrusion tube prevents radial displacement, while the elastic sealing ring compensates for machining tolerances and adapts to vibration conditions during equipment operation. Compared with existing technologies, this design ensures sealing performance while facilitating quick disassembly and maintenance of the forming extrusion tube, significantly improving the reliability and ease of maintenance of the equipment.

[0026] like Figure 2 , 3 As shown, this application further proposes that the core material feeding system includes multiple feed pipes longitudinally fixed to the upper part of the connecting crossbar and corresponding to the forming extrusion tube, with the outlet end of the feed pipe extending downward into the center of the forming extrusion tube. The discharge end of the feed pipe is tapered and bent along the discharge direction of the forming extrusion tube.

[0027] The feeding tube can be made of stainless steel, with an inner diameter preferably of 5-10mm and a wall thickness of 1-2mm. The feeding tube can be connected to the connecting crossbar by welding or threaded connection. The tapered guide bend at the feeding tube outlet ensures smoother flow of the filling material and reduces the flow resistance of the milk stick raw material, resulting in better and more uniform wrapping of the milk stick raw material around the filling material.

[0028] This technical solution achieves precise injection of the core material by extending the feeding tube directly to the center of the forming extrusion tube. The one-to-one correspondence between the feeding tube and the forming extrusion tube ensures a uniform supply of core material to each molded product. Compared to traditional core-forming methods that require additional equipment, this structure is directly integrated inside the molding machine, simplifying the equipment structure and reducing production costs. Specifically, the longitudinally positioned feeding tube fully utilizes the vertical space of the mixing chamber, while its fixation to the connecting crossbar ensures stability during high-speed production. Therefore, this solution effectively solves the technical challenge of traditional spiral extrusion molding machines being unable to process cored milk sticks.

[0029] like Figure 2 As shown, this application further proposes that the upper end of the feeding pipe extends to the outside of the mixing chamber and is connected to the control valve, and the inlet of the control valve is connected and fixed to the connecting pipe through a transparent flexible tube.

[0030] Specifically, the design of the feed pipe extending to the outside of the mixing chamber facilitates the connection and maintenance of the external feeding system. The control valve can be a manual ball valve for precise adjustment of the core material flow. Simultaneously, with the control valve closed, the screw extrusion molding machine can be used as a regular milk stick molding machine (without core clamping). The transparent flexible tube is preferably made of food-grade PVC or silicone for easy observation of the material flow. The connecting pipe can be a stainless steel tee fitting, with its side inlet end connected to the external feeding pipeline via a quick-release coupling for easy cleaning and replacement.

[0031] Therefore, this technical solution achieves a modular design for the core material supply system by extending the feeding pipes to the outside of the housing and configuring them with control valves and transparent hoses. The control valves precisely adjust the core material supply amount of each feeding pipe, the transparent hoses facilitate real-time observation of the material flow status, and the interconnected pipe structure simplifies the piping layout of the multi-feeding system. Compared with existing technologies, this design solves the problems of unstable core material supply and inconvenient flow adjustment, improves the consistency of core forming quality, and reduces equipment maintenance difficulty. Specifically, when it is necessary to adjust the core material ratio of different extrusion pipes, it can be done simply by adjusting the corresponding control valve, without stopping the machine or disassembling the equipment.

[0032] like Figure 2 As shown, this application further proposes that the connecting pipe is connected and fixed to the mixing box through the lower bracket, and the inlet end of the connecting pipe is connected and fixed to the outlet of the core material press through a pipeline.

[0033] Specifically, the connection between the connecting pipe and the support can be achieved through mechanical fixing methods such as welding, bolting, or snap-fit. The support can adopt L-shaped, T-shaped, or triangular support structures, and the preferred material for the support is stainless steel or aluminum alloy to balance strength and corrosion resistance. The pipe connection at the side inlet end of the connecting pipe can use quick couplings, flange connections, or threaded connections. The recommended pipe diameter range is 10-50mm to accommodate the conveying requirements of core materials with different viscosities. The core material press can be equipped with a gear pump, screw pump, or plunger pump for conveying (when the core material is chocolate, the core material press can convey chocolate that is maintained in a fluid paste state).

[0034] This technical solution uses a support frame to stably support the connecting pipes, preventing pipe vibration during core material conveying. Simultaneously, standardized pipe connections ensure the sealing and maintainability of the core material press and connecting pipes. Compared to existing core material conveying systems lacking dedicated support structures, this solution effectively prevents core material leakage caused by pipe displacement, and the support structure allows for easy adaptation to the mixing tank dimensions. The modular connection design between the connecting pipes and the press allows for quick disassembly and replacement during equipment maintenance, significantly improving the operational reliability of the sandwich milk stick production line.

[0035] like Figure 2As shown, this application further proposes that the lower part of the connecting crossbar is fixedly connected to the lower end wall of the mixing tank by multiple fixing rods.

[0036] Specifically, the fixing rods can be made of metal, such as stainless steel or aluminum alloy, to ensure structural strength and corrosion resistance. The number of fixing rods can be adjusted according to the size of the mixing tank and the load requirements of the connecting crossbars; typically, 3-5 fixing rods are used to achieve uniform stress distribution. The two ends of the fixing rods can be fixed to the connecting crossbars and the lower end wall of the mixing tank, respectively, by welding or bolting. As a preferred embodiment, a reinforcing plate can be installed at the connection between the fixing rod and the lower end wall of the mixing tank to improve connection stability.

[0037] Therefore, by fixing the connecting crossbar to the lower wall of the mixing chamber with a fixing rod, the structural stability of the connecting crossbar can be effectively enhanced, preventing it from shifting or vibrating due to uneven force during spiral extrusion. This technical solution solves the problem of insufficient rigidity that may occur in existing technologies where the connecting crossbar relies solely on upper support, ensuring precise alignment of the forming extrusion tube during processing and thus guaranteeing the synchronous and uniform extrusion of the core material and the external milk stick material. Compared with existing technologies, this structural design is simple and reliable, significantly improving equipment operational stability without the need for additional complex components.

[0038] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A spiral forming machine for processing a sandwich bar, comprising a spiral extrusion forming machine (1), characterized in that: The front end of the spiral extrusion molding machine (1) is connected to a mixing box (5). A connecting crossbar (6) is provided in the center of the mixing box (5). Multiple forming extrusion tubes (4) are inserted into the connecting crossbar (6). A core material feeding system for feeding the internal central core material (15) is provided on the upper part of the multiple forming extrusion tubes (4).

2. The spiral forming machine for processing sandwich milk sticks according to claim 1, characterized in that: The front end face of the mixing box (5) is fixedly connected to a sealing end plate (12). The sealing end plate (12) has several insertion holes (13) in the middle that correspond to the insertion of the molding extrusion tube (4). The insertion holes (13) are provided with sealing rings to seal the molding extrusion tube (4).

3. A spiral forming machine for processing sandwich milk sticks according to claim 1, characterized in that: The core material feeding system includes multiple feeding pipes (7) that are longitudinally fixed on the upper part of the connecting crossbar (6) and correspond to the forming extrusion tube (4). The outlet end of the feeding pipe (7) extends downward into the center of the interior of the forming extrusion tube (4).

4. A spiral forming machine for processing sandwich milk sticks according to claim 3, characterized in that: The discharge end of the feeding pipe (7) is set in a conical guide bend along the discharge direction of the forming extrusion pipe (4).

5. A spiral forming machine for processing sandwich milk sticks according to claim 3, characterized in that: The upper end of the feeding pipe (7) extends to the outside of the mixing box (5) and is connected to the control valve (8). The inlet of the control valve (8) is connected and fixed to the connecting pipe (10) through the transparent hose (9).

6. A spiral forming machine for processing sandwich milk sticks according to claim 5, characterized in that: The connecting pipe (10) is connected and fixed to the mixing box (5) through the lower bracket (11), and the side inlet end of the connecting pipe (10) is connected and fixed to the outlet of the core material press through a pipeline.

7. A spiral forming machine for processing sandwich milk sticks according to claim 3, characterized in that: The lower part of the connecting crossbar (6) is fixedly connected to the lower end wall of the mixing box (5) by multiple fixing rods (61).

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