Intermittent sandwich feeding mechanism

Abstract

The utility model provides an intermittent sandwich feeding mechanism which comprises a mixing cavity provided with a main material inlet, a filling pipe communicated with an outlet of the mixing cavity and a core material intermittent conveying assembly. The core material intermittent transmission assembly comprises a valve body provided with a core material hole, a main piston provided with a through hole, a driving part connected with the main piston and a sandwich pipe communicated with the bottom of the core material hole; the core material hole penetrates through the valve body, and the upper end of the core material hole is used for injecting a core material; the main piston is arranged in the valve body in a sliding manner, and the through hole can be communicated with or staggered from the core material hole under the driving of the driving part; and the sandwich pipe penetrates through the mixing cavity and extends into the filling pipe. In the implementation mode, the main piston can reciprocate in the valve body through the driving part, so that the through hole can be communicated with or staggered from the core material hole in the valve body. Therefore, intermittent injection of the core material can be realized.

Description

Technical Field

[0001] The utility model relates to the technical field of product packaging, in particular to an intermittent sandwich feeding mechanism. Background Art

[0002] The automatic vertical filling and packaging machine is also called the automatic filling and tying machine for ham sausage. It is a special equipment used for packaging and sealing operations when producing sausage products.

[0003] The core materials of sandwich products produced by relevant automatic vertical filling and packaging machines are the same as the total length of the ham sausage, which makes the core materials easy to flow during the movement of semi-finished products or high-temperature sterilization, resulting in a shorter shelf life of thinner or lower-viscosity core materials. Utility Model Content

[0004] The content of this utility model is used to introduce the concepts in a brief form, which will be described in detail in the detailed implementation section below. The content of this disclosure is not intended to identify the key features or essential features of the technical solution claimed for protection, nor is it intended to limit the scope of the technical solution claimed for protection.

[0005] The utility model provides an intermittent sandwich feeding mechanism to solve the technical problems mentioned in the above background technology part.

[0006] The intermittent sandwich feeding mechanism of the utility model comprises a mixing chamber provided with a main material inlet, a filling pipe connected to the outlet of the mixing chamber, and a core material intermittent transmission component, wherein:

[0007] The core material intermittent transmission assembly comprises a valve body provided with a core material hole, a main piston provided with a through hole, a driving part connected to the main piston, and a sandwich tube connected to the bottom of the core material hole;

[0008] The core material hole passes through the valve body, and the upper end of the core material hole is used for injecting the core material;

[0009] The main piston is slidably arranged in the valve body, and driven by the driving part, the through hole can be connected with or staggered with the core material hole;

[0010] The sandwich tube extends through the mixing chamber into the filling tube.

[0011] Optionally, a main shaft sliding copper sleeve is arranged in the valve body, and the main piston is slidably inserted into the main shaft sliding copper sleeve; the first end of the main piston is sleeved with a main shaft end cover fixed to the valve body.

[0012] Optionally, the driving part includes a fixing frame fixedly connected to the valve body, and a servo motor, a transmission shaft and a disc cam connected in sequence are arranged on the fixing frame; a cam bearing is fixedly provided on the second end of the main piston, and the cam bearing cooperates with a groove of the disc cam.

[0013] Optionally, a sensor bump is sleeved on the open end of the transmission shaft, and a sensor is provided on the fixing frame for determining whether the core material hole is connected with the through hole based on detecting the sensor bump.

[0014] Optionally, a coupling is connected between the servo motor and the transmission shaft.

[0015] Optionally, the driving unit also includes a guide column fixed to the fixed frame and parallel to the main piston, and a movable plate slidably connected to the guide column, the movable plate is fixedly connected to the main piston, and the connecting end of the cam bearing is fixedly connected to the movable plate.

[0016] Optionally, a linear bearing is provided on the movable plate, and the linear bearing is sleeved on the guide column.

[0017] Optionally, a secondary piston cavity and a secondary piston slidably arranged in the secondary piston cavity are provided at the bottom of the valve body, the first end of the secondary piston and the secondary piston cavity constitute a core material cavity, the core material cavity is always connected to the core material hole, and the second end of the secondary piston is fixedly connected to the movable plate.

[0018] Optionally, the auxiliary piston includes an auxiliary piston end cover, an auxiliary piston shaft and an auxiliary piston rod which are connected in sequence, and the auxiliary piston end cover and the auxiliary piston cavity constitute a core material cavity; sealing rings are sleeved at both ends of the auxiliary piston shaft; and the auxiliary piston rod is fixedly connected to the movable plate.

[0019] Optionally, the main material inlet is connected with a sandwich connecting pipe for injecting the main material; the upper end of the core material hole is connected with a feed connector for injecting the core material.

[0020] The above embodiments of the utility model have the following beneficial effects: through the intermittent sandwich feeding mechanism of some embodiments of the utility model, products with different lengths of core material and main material can be formed, that is, the main material is sealed at both ends of the product, and the core material is wrapped by the main material. Therefore, the core material can be prevented from flowing out, and the shelf life of the thinner or lower viscosity core material can be improved.

[0021] Specifically, intermittent feeding of the core material can be achieved through the core material intermittent transmission component. The main piston of the core material intermittent transmission component can reciprocate in the valve body through the driving part, so that the through hole on the main piston can be connected or staggered with the core material hole in the valve body. When the above-mentioned core material hole is staggered with the through hole, the core material injected from the upper end of the core material hole is blocked by the main piston and cannot be injected. When the above-mentioned core material hole is connected with the through hole, the core material can be injected into the sandwich tube through the core material hole. In this way, intermittent injection of the core material can be achieved by controlling the movement of the main piston through the driving part.

[0022] Furthermore, the filling tube is connected to the mixing chamber, and the sandwich tube extends into the filling tube. In the early and late stages of filling, the through hole and the core material are staggered, and the main material enters the packaging film alone to form a seal. In the middle stage of filling, the through hole is connected to the core material hole, and the main material can wrap the core material and enter the packaging film. The seals at both ends can wrap the core material and prevent the core material from flowing, thereby increasing the shelf life of the core material with lower viscosity. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a three-dimensional structural schematic diagram of the intermittent sandwich feeding mechanism of the utility model;

[0025] Figure 2 It is a schematic diagram of the longitudinal section structure of the intermittent sandwich feeding mechanism of the utility model;

[0026] Figure 3 It is a cross-sectional structural schematic diagram of the intermittent sandwich feeding mechanism of the utility model;

[0027] Figure 4 It is another three-dimensional structural schematic diagram of the intermittent sandwich feeding mechanism of the utility model.

[0028] Description of reference numerals:

[0029] 11: sandwich connecting tube; 12: mixing chamber; 13: filling tube; 14: split connector; 21: feed connector; 22: valve body; 23: core material hole; 24: main piston; 25: main shaft sliding copper sleeve; 26: main shaft end cover; 27: O-ring; 28: sandwich tube; 31: fixing bracket; 32: servo motor; 33: coupling; 34: transmission shaft; 35: disc cam; 36: cam bearing; 37: guide column; 38: movable plate; 41: auxiliary piston end cover; 42: auxiliary piston shaft; 43: auxiliary piston shaft; 44: sealing ring; 45: core material chamber; 51: sensor bumper; 52: sensor. DETAILED DESCRIPTION

[0030] The technical solution of the utility model will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0032] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, "multiple" means two or more, unless otherwise clearly and specifically defined. In addition, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal connection of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0033] The present disclosure will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0034] First see Figure 1 and Figure 2 , Figure 1 It is a three-dimensional structural schematic diagram of the intermittent sandwich feeding mechanism of the utility model; Figure 2 The longitudinal section structure diagram of the intermittent sandwich feeding mechanism of the utility model. The intermittent sandwich feeding mechanism includes a mixing chamber 12, connected to the bottom of the mixing chamber 12 ( Figure 1 The split connector 14 and the filling pipe 13 connected to the split connector 14, and the filling pipe 13 connected to the upper part of the mixing chamber 12 ( Figure 1 A core material intermittent transmission component for the direction in the middle).

[0035] The left end of the mixing chamber 12 is provided with a main material inlet, which can be connected to the sandwich connecting tube 11. The open end of the sandwich connecting tube 11 can be connected to a joint. In the working state, the main material feeding device can be connected to the above-mentioned connecting joint, so that the main material can be injected into the mixing chamber 12.

[0036] The bottom of the mixing chamber 12 is provided with an outlet, which is communicated with the filling tube 13. In order to enhance the connection strength between the filling tube 13 and the mixing chamber 12, the mixing chamber 12 and the filling tube 13 can be connected from both sides by a split connector 14. The main material in the mixing chamber 12 can be filled into the packaging film covering the surface of the filling tube 13 through the filling tube 13.

[0037] Continue reading Figure 1 and Figure 2 The intermittent transfer assembly of the core material may include a valve body 22, a main piston 24, a driving part and a sandwich tube 28. The valve body 22 is provided with a core material hole 23 which is vertically penetrated. The upper end ( Figure 2 The feed connector 21 can be connected to the core material feeding device, so that the core material is injected into the core material hole 23 by the feed connector 21.

[0038] The main piston 24 is slidably disposed in the valve body 22. Specifically, the first end ( Figure 2 The spindle end cover 26 and the Y-shaped sealing ring can be provided. The spindle end cover 26 is fixed to the first end surface ( Figure 2 The left end of the valve body 22 can fix the Y-shaped sealing ring in the piston hole where the main piston 24 is located. A main shaft sliding copper sleeve 25 is also provided in the valve body 22, and the main piston 24 can be slidably inserted into the main shaft sliding copper sleeve 25, so that the main piston 24 can only slide along its own axial direction, limiting the sliding direction. Furthermore, an O-ring 27 can be sleeved on the main piston 24 for further sealing to prevent the core material from leaking as the main piston 24 slides.

[0039] The main piston 24 is provided with a through hole. As the driving part drives the main piston 24 to slide, the through hole can be connected with or staggered from the core material hole 23 .

[0040] The upper end of the sandwich tube 28 is connected to the bottom of the core material hole 23, and the bottom of the sandwich tube 28 passes through the mixing chamber 12 and extends into the filling tube 13. In the working state, when the core material hole 23 is staggered with the through hole, only the main material is filled into the packaging film by the filling tube 13, thereby forming a seal. When the core material hole 23 is connected to the through hole on the main piston 24, the main material can wrap the core material and fill it into the packaging film. In this way, a product with sealed ends can be formed, and the flow of the core material can be avoided, thereby improving the shelf life of the core material with lower viscosity.

[0041] The driving part can be connected to the second end ( Figure 2 As an example, the driving unit may include a telescopic rod or a ball screw and a fixing bracket 31, which may be connected to the second end surface ( Figure 2 The fixing frame 31 is fixedly connected to the right end of the main piston 24. A telescopic rod or a ball screw engaged with the second end of the main piston 24 can be provided on the fixing frame 31. The telescopic rod can be an electric push rod or an electromagnetic push rod. In the working state, the telescopic rod can push and pull the main piston 24, so that the main piston 24 reciprocates. Thereby, the through hole can be connected with or staggered with the core hole 23.

[0042] See next Figure 3 and Figure 4 , Figure 3 It is a cross-sectional structural schematic diagram of the intermittent sandwich feeding mechanism of the utility model; Figure 4 FIG. 2 is another three-dimensional structural diagram of the intermittent sandwich feeding mechanism of the present utility model. Figure 3 and Figure 4 As shown, the driving part includes not only a fixed frame 31 but also a servo motor 32, a transmission shaft 34 and a disc cam 35 which are connected in sequence on the fixed frame 31. The transmission shaft 34 can be rotated around its own axis by a deep groove ball bearing which is sleeved on the transmission shaft 34 and connected to the fixed frame 31, and the tightness between the transmission shaft 34 and the deep groove ball bearing can be enhanced by sleeved shaft elastic retaining ring. The above-mentioned disc cam 35 is sleeved on the transmission shaft 34, and the disc cam 35 is provided with a groove of a cam track. In the working state, the servo motor 32 can drive the transmission shaft 34 and the disc cam 35 to rotate. Further, a reducer can be added between the servo motor 32 and the transmission shaft 34. The reducer and the transmission shaft 34 can be connected through a coupling 33.

[0043] A movable plate 38 can be fixedly connected to the second end of the main piston 24, and a cam bearing 36 is fixedly connected to the movable plate 38, and the bearing end of the cam bearing 36 cooperates with the groove of the above-mentioned disc cam 35. In the working state, as the disc cam 35 rotates, the cam bearing 36 can drive the movable plate 38 to reciprocate, thereby driving the main piston 24 to reciprocate.

[0044] Furthermore, in order to enable the cam bearing 36 to move along the axis of the main piston 24 and reduce the friction between the main piston 24 and the valve body 22, a guide column 37 arranged parallel to the main piston 24 and a movable plate 38 sleeved on the guide column 37 can be fixed on the above-mentioned fixed frame 31. Those skilled in the art can determine the number of the above-mentioned guide columns 37 according to actual conditions, which can be two, four or more. The above-mentioned movable plate 38 is provided with linear bearings or self-lubricating copper sleeves corresponding to the number of guide columns 37, and multiple linear bearings or self-lubricating copper sleeves are sleeved on multiple guide columns 37 one by one, so that the movable plate 38 can slide along the axis of the guide columns 37. A linear bearing washer can be arranged between the linear bearing and the movable plate 38, and the linear bearing is fixed to the movable plate 38 by a shaft elastic retaining ring. The second end of the above-mentioned main piston 24 can be fixedly connected to the movable plate 38 by screws, and the connecting end of the cam bearing 36 can also be fixedly connected to the movable plate 38. As a result, in the working state, the cam bearing 36 can drive the movable plate 38 and the main piston 24 to reciprocate along the axial direction of the guide column 37 under the drive of the disc cam 35 .

[0045] Re-read Figure 2 The bottom of the valve body 22 is provided with a secondary piston chamber. The secondary piston chamber is used to slidably place the secondary piston. The secondary piston includes a Figure 2 The auxiliary piston end cover 41, the auxiliary piston shaft 42 and the auxiliary piston rod 43 are connected in sequence (in the direction of the auxiliary piston). The auxiliary piston rod 43 is fixedly connected to the movable plate 38, which enables the auxiliary piston to slide synchronously with the main piston 24 in the auxiliary piston cavity. The auxiliary piston end cover 41 separates the auxiliary piston cavity, and the left side constitutes a core material cavity 45. The core material cavity 45 is always connected to the core material hole 23, that is, the sliding of the auxiliary piston will not block the core material hole 23. In the process of injecting the core material, the core material can be collected in the core material cavity 45. Sealing rings 44 can be sleeved on both ends of the auxiliary piston shaft 42 to prevent the core material from leaking as the auxiliary piston shaft 42 slides.

[0046] Figure 2 The figure shows the state where the through hole on the main piston 24 is connected to the core hole 23. Figure 2After the movable plate 38 is pulled in the direction of the center, the main piston 24 and the auxiliary piston both slide to the right. At this time, the through hole and the core material hole 23 are offset, and the injection of the core material is stopped. In this process, when the auxiliary piston moves to the right, the space of the core material cavity 45 is increased, and a vacuum negative pressure can be generated, providing an upward suction force for the core material remaining in the sandwich tube 28, thereby preventing the core material from being injected into the main material and affecting the sealing.

[0047] like Figure 3 and Figure 4 As shown, a sensor bump 51 can also be sleeved on the transmission shaft 34, and a sensor 52 can be fixed on the fixing frame 31. As an example, the sensor bump 51 can be provided with a protrusion, and the sensor 52 can be a proximity switch. When the protrusion rotates to the proximity switch, it can be detected by the proximity switch, which can indicate that the transmission shaft 34 is rotated into place, and the through hole on the main piston 24 is connected or staggered with the core material hole 23, so that the feeding device of the core material can be controlled to be turned on or off. It can also be used to obtain the position of the disc cam 35 and the main piston 24. Of course, the combination of the sensor bump 51 and the sensor 52 can also be replaced by an encoder or an angle sensor, which can be determined by those skilled in the art according to actual conditions or common knowledge.

[0048] In the working state, the cam drives the cam bearing 36 to slide to the right, so that the through hole on the main piston 24 is staggered with the core material hole 23. The main material feeding device fills the main material from the filling tube 13 into the packaging film, and the core material is sealed with the main material to form a lower end seal. Next, the cam drives the cam bearing 36 to slide to the left, so that the through hole on the main piston 24 is connected with the core material hole 23, and the core material feeding device fills the core material from the core material hole 23, the core material cavity 45 and the sandwich tube 28 into the main material. At this time, the main material wraps the core material and is filled into the packaging film together. When the upper end seal is required, the cam drives the cam shaft to slide to the right, so that the through hole on the main piston 24 and the core material hole 23 are staggered again. In this process, the secondary piston slides to the right to provide upward suction for the core material remaining in the sandwich tube 28, thereby avoiding the residual core material in the upper end seal, thereby improving the sealing quality.

[0049] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model.

Claims

1. An intermittent sandwich feeding mechanism, characterized in that: It comprises a mixing chamber provided with a main material inlet, a filling pipe connected to the mixing chamber outlet, and a core material intermittent transmission component, wherein: The core material intermittent transmission assembly comprises a valve body provided with a core material hole, a main piston provided with a through hole, a driving part connected to the main piston, and a sandwich tube connected to the bottom of the core material hole; The core material hole passes through the valve body, and the upper end of the core material hole is used for injecting the core material; The main piston is slidably arranged in the valve body, and driven by the driving part, the through hole can be connected with or staggered with the core material hole; The sandwich tube passes through the mixing chamber and extends into the filling tube; The driving part includes a fixing frame fixedly connected to the valve body, and a servo motor, a transmission shaft and a disc cam connected in sequence are arranged on the fixing frame; a cam bearing is fixedly provided at the second end of the main piston, and the cam bearing cooperates with a groove of the disc cam.

2. The intermittent sandwich feeding mechanism according to claim 1, characterized in that: A main shaft sliding copper sleeve is arranged in the valve body, and the main piston is slidably inserted into the main shaft sliding copper sleeve; a main shaft end cover fixed to the valve body is sleeved on the first end of the main piston.

3. The intermittent sandwich feeding mechanism according to claim 1, characterized in that: The open end of the transmission shaft is sleeved with a sensor bump, and the fixing frame is provided with a sensor for determining whether the core material hole is connected with the through hole according to the detection of the sensor bump.

4. The intermittent sandwich feeding mechanism according to claim 1, characterized in that: A coupling is connected between the servo motor and the transmission shaft.

5. The intermittent sandwich feeding mechanism according to claim 1, characterized in that: The driving part also includes a guide column fixed to the fixing frame and parallel to the main piston, and a movable plate slidably connected to the guide column, the movable plate is fixedly connected to the main piston, and the connecting end of the cam bearing is fixedly connected to the movable plate.

6. The intermittent sandwich feeding mechanism according to claim 5, characterized in that: A linear bearing is arranged on the movable plate, and the linear bearing is sleeved on the guide column.

7. The intermittent sandwich feeding mechanism according to claim 5, characterized in that: The bottom of the valve body is provided with a secondary piston cavity and a secondary piston slidably arranged in the secondary piston cavity, the first end of the secondary piston and the secondary piston cavity form a core material cavity, the core material cavity is always connected with the core material hole, and the second end of the secondary piston is fixedly connected to the movable plate.

8. The intermittent sandwich feeding mechanism according to claim 7, characterized in that: The auxiliary piston comprises an auxiliary piston end cover, an auxiliary piston shaft and an auxiliary piston shaft rod which are connected in sequence. The auxiliary piston end cover and the auxiliary piston cavity form a core material cavity. Sealing rings are sleeved at both ends of the auxiliary piston shaft. The auxiliary piston shaft rod is fixedly connected to the movable plate.

9. The intermittent sandwich feeding mechanism according to claim 1, characterized in that: The main material inlet is connected with a sandwich connecting pipe for injecting the main material; the upper end of the core material hole is connected with a feed joint for injecting the core material.

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