Capsule stripping mechanism for full-automatic hard capsule production line

Abstract

The invention discloses a capsule stripping mechanism for a full-automatic hard capsule production line, which comprises a transmission case, a plurality of rotating shafts are connected to the transmission case, the plurality of rotating shafts are horizontally arranged at fixed intervals, the transmission case drives the plurality of rotating shafts to synchronously rotate according to a fixed rotating angle, and the tail ends of the rotating shafts are coaxially connected with stripping execution units. And the rotating shaft drives the stripping execution unit to rotate to tangentially extrude the mold needle of the mold coated with the molded capsule, so that the molded capsule is separated from the mold needle under the action of friction force. A plurality of independent mold needles of a single-row-needle mold or a double-row-needle mold can be tangentially and rotationally extruded at the same time in a limited space, the single mold needle is tangentially extruded from the two sides at the same time, stress is uniform, the single mold needle is not damaged, and the problem that in the full-automatic hard capsule production process, the production efficiency is high is solved. The problem that the capsule is not easy to separate from the mold due to the fact that the molded capsule wraps the mold needle too tightly is solved, and the requirement that demolding is easier under the standard free oil content is met.

Description

Technical Field

[0001] This invention belongs to the field of capsule production equipment technology, and particularly relates to a capsule peeling mechanism for a hard capsule production line. Background Technology

[0002] In the production process of fully automated hard capsules, the capsule molds dipped in capsule solution must undergo a drying process. After drying, the formed capsules that meet the moisture content requirements will tightly wrap around the surface of the mold pins, making it difficult for the capsules to be ejected from the mold. In the next stage of capsule demolding, this can easily cause capsule breakage, affecting the quality of the finished product, or some capsules may not detach from the mold pins. Incompletely demolded capsule molds, after being dipped in capsule solution again, will form coarse capsules, which can easily damage parts in subsequent steps. Therefore, to ensure the continuity of capsule production, most manufacturers currently increase the free oil content in the capsule solution to aid demolding. However, if the added free oil is not effectively encapsulated during production, it can cause the capsules to stick and clump together, affecting the product's flowability. Furthermore, excessive free oil directly exposed is more prone to oxidation, leading to defects in the product's appearance and affecting its transparency. Summary of the Invention

[0003] In view of the problems and defects mentioned in the background art, the present invention provides a capsule stripping mechanism for a fully automatic hard capsule production line. After the capsule drying process and before the capsule demolding process, the shaped capsule on the capsule mold needle is tangentially squeezed, and the shaped capsule is separated from the mold needle under the action of friction, which facilitates the subsequent capsule demolding.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A capsule peeling mechanism for a fully automated hard capsule production line includes a transmission box with several rotating shafts connected to it. The rotating shafts are arranged horizontally at a fixed interval. The transmission box drives the rotating shafts to rotate synchronously at a fixed rotation angle. A peeling execution unit is connected to the end of each rotating shaft. The peeling execution unit is integrally composed of a metal core shaft and a flexible peeling element. The metal core shaft is coaxially connected to the rotating shafts. The cross-section of the flexible peeling element is a centrally symmetrical shape, and the profile curve of the cross-section adopts a cam curve. The cam curve is one of a variable diameter curve, an involute curve, or a multi-segment combination curve. The flexible peeling element is made of food / pharmaceutical grade safe material.

[0005] Preferably, the rotating shaft is an integral gear shaft, with a gear portion at the root for connection to the transmission box, and a connecting portion at the end for connection to the metal mandrel.

[0006] Preferably, the rotating shafts are arranged in one or two rows, and the number of rotating shafts corresponds to the number of die needles in the single-row or double-row die in the production line.

[0007] The transmission box includes a power source, a housing, a large gear, a first rack, and a second rack. The first rack and the second rack are both horizontally arranged. The power source drives the large gear. The first rack and the second rack mesh with the large gear. Several rotating shafts arranged in the upper row mesh with the first rack through gear sections. Several rotating shafts arranged in the lower row mesh with the second rack through gear sections.

[0008] The present invention further provides a fully automatic hard capsule production line, including the capsule peeling mechanism described above. The capsule peeling mechanism is used to rotate and tangentially extrude and peel off the molded capsules wrapped on the mold pins after drying. Under the action of friction, the molded capsules are separated from the mold pins, which facilitates the subsequent capsule demolding process.

[0009] Compared with the prior art, the present invention has the following advantages: (1) This invention drives several rotating shafts to rotate synchronously at a fixed rotation angle through a transmission box. The rotating shafts drive the peeling execution unit connected to them to rotate. The cross-sectional profile curve of the flexible peeling part of the peeling execution unit adopts a cam curve. When the peeling execution unit rotates, it rotates and squeezes the mold needles wrapped with the molded capsules on both sides. Under the action of friction, the molded capsules separate from the mold needles. Moreover, the molded capsules can be tangentially rotated and squeezed by the flexible peeling parts on both sides at the same time, so that the force on a single mold needle is uniform. This solves the problem that the capsules are not easy to get out of the mold in the fully automatic hard capsule production process because the molded capsules are too tightly wrapped in the mold, and realizes the requirement of easier demolding under standard free oil content. (2) The present invention can adjust the rotation angle of the rotating shaft and the peeling execution unit by controlling and adjusting the stroke of the rack of linear motion, thereby increasing or decreasing the tangential force of the peeling execution unit to squeeze the capsule, so as to meet the performance requirements of the capsule ejection pin. (3) The present invention can be configured with one or two rows of rotating shafts according to the type of mold used on the production line, so that it is applicable to single-row needle molds or double-row needle molds. Attached Figure Description

[0010] Figure 1 This is a schematic diagram illustrating the overall structure and application scenarios of the present invention; Figure 2 This is a schematic diagram showing the connection between the rotating shaft and the stripping execution unit of the present invention; Figure 3 A schematic diagram of the transmission principle of a transmission box suitable for single-row die pin molds; Figure 4A schematic diagram of the transmission principle of a transmission box suitable for double-row die pin molds; Figure 5 This is a schematic diagram of the rotational peeling contact process of the flexible peeling component of the present invention; Reference numerals: 1. Transmission box; 11. Large gear; 12. First rack; 13. Second rack; 2. Rotating shaft; 21. Gear section; 22. Connecting section; 3. Peeling execution unit; 31. Metal mandrel; 32. Flexible peeling component; 4. Mold needle; 5. Mold; 6. Molding capsule. Detailed Implementation

[0011] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0012] like Figure 1 and Figure 2 As shown, a capsule peeling mechanism for a fully automated hard capsule production line includes a transmission box 1, on which a plurality of rotating shafts 2 are connected. The transmission box 1 is used to drive the plurality of rotating shafts 2 to rotate at a fixed rotation angle. The ends of the rotating shafts 2 are connected to peeling execution units 3. The peeling execution unit 3 is integrally composed of a metal core shaft 31 and a flexible peeling component 32. The metal core shaft 31 is coaxially connected to the rotating shafts 2.

[0013] The flexible peeling part 32 is made of a flexible material that meets the requirements of food and pharmaceuticals. The flexible peeling part 32 has a columnar structure and its length is slightly longer than half the length of the molded capsule 6. The cross-section of the flexible peeling part 32 is a centrally symmetrical figure. When rotated, it can simultaneously tangentially squeeze the molded capsules 6 on both sides. The profile curve of the cross-section adopts a cam curve. The cam curve is one of the following: a variable diameter curve, an involute curve, or a multi-segment combination curve.

[0014] Among them, the rotating shaft 2 is an integral gear shaft, and a gear part 21 is provided on the rotating shaft 2. The rotating shaft 2 is meshed with the gear component inside the transmission box 1 through the gear part 21. The end of the rotating shaft 2 is also provided with a connecting part 22 for connecting with the metal core shaft 31. The metal core shaft 31 is connected to the connecting part 22 of the rotating shaft 2.

[0015] The number and arrangement of the rotating shafts 2 connected to the transmission box 1 are set according to the type of mold used on the hard capsule production line. For single-row mold pins used on the production line, the rotating shafts can be arranged in one row; for double-row mold pins used on the production line, the rotating shafts can be arranged in two rows. The number of rotating shafts corresponds to the number of mold pins of the corresponding type of mold. The gap between two adjacent flexible peeling parts 32 in the same row is used to accommodate a single mold pin 4 containing a molded capsule 6. When a single flexible peeling part 32 rotates, it simultaneously exerts tangential pressure on the mold pins 4 on both sides. Similarly, a single mold pin 4 can be simultaneously subjected to tangential pressure from the flexible peeling parts 32 on both sides.

[0016] When the rotating shafts 2 are arranged in a row, the transmission box 1 is configured as a housing, a power source, a large gear 11, and a first rack 12. For example... Figure 3 As shown, the first rack 12 is horizontally arranged, and the power source drives the large gear 11. The large gear 11 meshes with the first rack 12. Several rotating shafts 2 mesh with the first rack 12 through the gear section 21. When the rotating shafts 2 are arranged in a row, the working principle of this peeling mechanism is as follows: the power source of the transmission box 1 drives the large gear 11 to rotate at a fixed rotation angle. The large gear 11 drives the first rack 12 to move horizontally back and forth with a fixed stroke. The first rack 12 drives all the rotating shafts 2 to rotate synchronously at a fixed rotation angle. The rotating shafts 2 drive the peeling execution unit 3 connected at the end to rotate. The flexible peeling part 32 of the peeling execution unit 3 realizes the double-sided tangential extrusion of the mold needle 4 containing the molded capsule 6. Under the action of friction, the molded capsule 6 is peeled off from the mold needle 4.

[0017] When the rotating shaft 2 is arranged in two rows, the transmission box 1 is configured as a power source, a large gear 11, a first rack 12, and a second rack 13. For example... Figure 4 As shown, the power source drives the large gear 11. The first rack 12 and the second rack 13 are both horizontally arranged and mesh with the large gear 11. Several rotating shafts 2 arranged in the upper row mesh with the first rack 12 through the gear part 21, and several rotating shafts 2 arranged in the lower row mesh with the second rack 13 through the gear part 21. When the rotating shafts 2 are arranged in two rows, the working principle of this peeling mechanism is as follows: the power source of the transmission box 1 drives the large gear 11 to rotate at a fixed rotation angle. The large gear 11 simultaneously drives the first rack 12 and the second rack 13 to move horizontally back and forth in opposite directions with a fixed stroke. The first rack 12 drives all the rotating shafts 2 in the upper row to rotate synchronously at a fixed rotation angle, and the second rack 13 drives all the rotating shafts 2 in the lower row to rotate synchronously at a fixed rotation angle. The rotating shafts 2 drive the peeling execution unit 3 connected at the end to rotate. The flexible peeling part 32 of the peeling execution unit 3 realizes the double-sided tangential compression of the mold needle 4 containing the molded capsule 6, and peels the molded capsule 6 from the mold needle 4 under the action of friction.

[0018] It should be noted that the transmission structure inside the transmission box 1 can adopt other structures besides the gear and rack mechanism.

[0019] The peeling process of the flexible peeling element 32 is as follows Figure 5 As shown, after the mold is placed into the capsule peeling mechanism of this invention, the flexible peeling member 32 does not contact the formed capsule 6 at the initial angle. After rotating a certain angle, it first contacts the formed capsule 6 covering the surface of the mold needle 4, and then rotates a small angle to squeeze the formed capsule 6 covering the surface of the mold needle 4. Under the squeezing action, a tangential frictional force is formed between the flexible peeling member 32 and the formed capsule 6. When the flexible peeling member 32 rotates, the formed capsule 6 disengages from the mold needle 4. After disengagement, the flexible peeling member 32 reverses and returns to its original position, removing or pushing the mold 5 out of the capsule peeling mechanism. In this invention, the rotation angle of the rotating shaft 2 and the peeling execution unit 3 is adjusted by controlling and adjusting the stroke of the linear motion rack to increase or decrease the tangential force of the peeling member 32 squeezing the formed capsule 6, so as to meet the performance requirements of peeling the formed capsule 6.

[0020] This invention solves the problem that in the fully automated production of hard capsules, the formed capsule 6 is too tightly wrapped around the mold 5, making it difficult for the formed capsule 6 to be removed from the mold 5. It achieves the requirement of easier demolding under standard free oil content.

[0021] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A capsule stripping mechanism for a fully automatic hard capsule production line, characterized in that, The transmission box (1) is connected with a plurality of rotating shafts (2), the rotating shafts (2) are arranged horizontally at a fixed interval, the transmission box (1) is used for driving the rotating shafts (2) to rotate synchronously at a fixed rotation angle, the rotating shaft (2) is connected with a stripping execution unit (3), the stripping execution unit (3) is composed of a metal core shaft (31) and a flexible stripping piece (32), the metal core shaft (31) is coaxially connected with the rotating shaft (2), the cross section of the flexible stripping piece (32) is a central symmetric figure, and the profile curve of the cross section adopts a cam curve, the cam curve is one of a variable-diameter curve, an involute curve and a multi-segment combined curve, and the flexible stripping piece (32) is made of a food / pharmaceutical grade safety material.

2. A capsule stripping mechanism according to claim 1, characterized in that The rotating shaft (2) is an integral gear shaft, the rotating shaft (2) is provided with a gear part (21) at the root for connecting with the transmission box (1), and the rotating shaft (2) is provided with a connecting part (22) at the end for connecting with the metal core shaft (31).

3. A capsule stripping mechanism according to claim 2, characterised in that, The rotating shaft (2) is arranged in one row or two rows, and the number of the rotating shaft (2) corresponds to the number of the mold needles (4) of the single-row mold or the double-row mold in the production line.

4. A capsule stripping mechanism according to claim 3, characterised in that, The rotating shaft (2) is arranged in two rows, the transmission box (1) includes a power source, a shell, a large gear (11), a first rack (12) and a second rack (13), the first rack (12) and the second rack (13) are both arranged horizontally, the power source drives the large gear (11), the first rack (12) and the second rack (13) are both engaged with the large gear (11), the rotating shafts (2) arranged in the upper row are all engaged with the first rack (12) through the gear parts (21), and the rotating shafts (2) arranged in the lower row are all engaged with the second rack (13) through the gear parts (21).

5. A fully automatic hard capsule production line characterized by, The capsule stripping mechanism is used for rotating and tangentially extruding the formed capsule wrapped on the mold needle after drying, and the friction force is used to separate the formed capsule from the mold needle.

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