Capsule demolding mechanism

Abstract

This utility model discloses a capsule demolding mechanism, comprising: an upper mold frame and a lower mold frame, which are disposed below the injection molding of a capsule production equipment; multiple sets of capsule molds, each capsule mold including an upper capsule mold and a lower capsule mold, the multiple sets of upper capsule molds being disposed inside the upper mold frame and the multiple sets of lower capsule molds being disposed inside the lower mold frame, wherein the upper capsule mold includes two sets of first mold fittings and the lower capsule mold includes two sets of second mold fittings, both the upper mold frame and the lower mold frame are provided with mold fitting grooves, the two sets of first mold fittings sliding inside the mold fitting grooves of the upper mold frame and the two sets of second mold fittings sliding inside the mold fitting grooves of the lower mold frame; two sets of drive frames are slidably disposed on the bottom surface of the lower mold frame, one set of drive frames being connected to the first mold fittings and the other set of drive frames being connected to the second mold fittings, and a first bidirectional cylinder is fixed on the bottom surface of the lower mold frame, the two moving ends of the first bidirectional cylinder being respectively connected to the two sets of drive frames.

Description

Technical Field

[0001] This utility model relates to the technical field of capsule production, and in particular to a capsule demolding mechanism. Background Technology

[0002] In capsule production, demolding is a crucial step connecting molding and subsequent processing. Existing capsule demolding mechanisms mostly employ rigid clamping or pushing structures, using mechanical force directly applied to the capsule surface to complete the demolding action. Because the capsule shell material is relatively soft and requires high uniformity of wall thickness, these mechanisms are prone to problems such as improper clamping force control and mismatch between the demolding trajectory and the capsule's molding surface, leading to localized compression or friction during the capsule's separation from the mold cavity. This compression can cause deformation such as dents and wrinkles in the capsule shell, and may also lead to a decrease in the sealing performance at the joint between the capsule body and the capsule cap, and in severe cases, even cause the capsule to rupture. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, the purpose of this utility model is to propose a capsule demolding mechanism that avoids the squeezing of the capsule caused by the demolding action and reduces the deformation of the capsule.

[0005] To achieve the above objectives, this utility model proposes a capsule demolding mechanism, comprising: An upper mold frame and a lower mold frame, wherein the upper mold frame and the lower mold frame are disposed below the injection mold of the capsule production equipment; Multiple sets of capsule molds, each capsule mold including an upper capsule mold and a lower capsule mold, wherein the multiple sets of upper capsule molds are disposed inside the upper mold frame, and the multiple sets of lower capsule molds are disposed inside the lower mold frame, wherein... The upper bladder template includes two sets of first mold parts, and the lower bladder template includes two sets of second mold parts. Both the upper mold frame and the lower mold frame are provided with mold parting grooves. The two sets of first mold parts slide inside the mold parting groove of the upper mold frame, and the two sets of second mold parts slide inside the mold parting groove of the lower mold frame. The bottom surface of the lower mold frame is provided with two sets of drive frames that slide together. One set of drive frames is connected to the first mold and the other set of drive frames is connected to the second mold. The bottom surface of the lower mold frame is fixed with a first bidirectional cylinder, and the two moving ends of the first bidirectional cylinder are respectively connected to the two sets of drive frames.

[0006] The capsule demolding mechanism of this invention avoids the squeezing of the capsule caused by the demolding action and reduces the possibility of capsule deformation.

[0007] In addition, the capsule demolding mechanism proposed in this application may also have the following additional technical features: Specifically, a first auxiliary spring is provided between the first mold and the upper mold frame; A second auxiliary spring is provided between the second mold and the lower mold frame.

[0008] Specifically, it also includes a flipping mechanism, which includes a flipping bearing seat. The upper mold frame and the lower mold frame are mounted on the main frame. The main frame rotates around the center of the flipping bearing seat. A flipping motor is mounted on the outer shaft of the flipping bearing seat. The output of the flipping motor is connected to one end of the main frame.

[0009] Specifically, both the upper mold frame and the lower mold frame slide on the main frame; The main frame is equipped with a second bidirectional cylinder, and the two moving ends of the second bidirectional cylinder are respectively connected to the upper mold frame and the lower mold frame; The bottom surface of the upper bladder template is provided with a first coupling groove, and the top surface of the lower bladder template is provided with a second coupling groove that matches the first coupling groove.

[0010] Specifically, the inner wall of the first coupling groove is provided with an elastic sealing ring, and the inner wall of the second coupling groove is provided with a sealing groove that is adapted to the elastic sealing ring. The cross-section of the elastic sealing ring is semi-circular, and the cross-section of the sealing groove is an arc shape that matches the semi-circular shape.

[0011] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0012] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the following description of the embodiments taken in conjunction with the accompanying drawings, in which: Figure 1 This is a schematic diagram of the capsule demolding mechanism according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the structure of the mold frame and its connecting components in a capsule demolding mechanism according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the split structure of the mold frame and its connecting components in a capsule demolding mechanism according to an embodiment of the present invention; Figure 4 This is a schematic diagram of the split structure of the capsule mold in a capsule demolding mechanism according to an embodiment of the present invention; Figure 5 This is a schematic diagram of the split structure of the capsule demolding mechanism according to an embodiment of the present invention.

[0013] As shown in the figure: 1. Upper mold frame; 2. Lower mold frame; 3. Capsule mold; 4. Drive frame; 5. First bidirectional cylinder; 6. First auxiliary spring; 7. Second auxiliary spring; 8. Tilting mechanism; 301. Upper capsule mold; 302. Lower capsule mold; 303. Mold fitting groove; 3011. First mold fitting; 3021. Second mold fitting; 801. Tilting bearing seat; 802. Main frame. Detailed Implementation

[0014] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention. Rather, the embodiments of the present invention include all variations, modifications, and equivalents falling within the spirit and scope of the appended claims.

[0015] The capsule demolding mechanism of this utility model embodiment will be described below with reference to the accompanying drawings.

[0016] like Figures 1-5 As shown, the capsule demolding mechanism of this utility model embodiment includes: Upper mold frame 1 and lower mold frame 2 are located below the injection mold of the capsule production equipment.

[0017] Multiple capsule molds 3 are provided, each including an upper capsule mold 301 and a lower capsule mold 302. The upper capsule molds 301 are disposed inside an upper mold frame 1, and the lower capsule molds 302 are disposed inside a lower mold frame 2. Each upper capsule mold 301 includes two sets of first mold fittings 3011, and each lower capsule mold 302 includes two sets of second mold fittings 3021. Both the upper mold frame 1 and the lower mold frame 2 are provided with mold fitting grooves 303. The two sets of first mold fittings 3011 slide within the mold fitting grooves 303 of the upper mold frame 1, and the two sets of second mold fittings 3021 slide within the mold fitting grooves 303 of the lower mold frame 2. Two sets of drive frames 4 are slidably mounted on the bottom surface of the lower mold frame 2. One set of drive frames 4 is connected to the first mold fittings 3011, and the other set of drive frames 4 is connected to the second mold fittings 3021. A first bidirectional cylinder 5 is fixed to the bottom surface of the lower mold frame 2, and the two moving ends of the first bidirectional cylinder 5 are respectively connected to the two sets of drive frames 4.

[0018] Specifically, after the injection molding process of the capsule production equipment is completed, the formed capsule blank is still embedded in the cavity formed by the closing of the upper capsule mold 301 and the lower capsule mold 302. At this time, the first bidirectional cylinder 5 is in the initial extended state, and the bidirectional moving end pushes the two sets of drive frames 4 to press against the first mold assembly 3011 and the second mold assembly 3021 respectively, so that the two sets of first mold assemblies 3011 fit tightly in the mold assembly groove 303, and the two sets of second mold assemblies 3021 close synchronously, ensuring that the capsule blank maintains its complete shape during the transfer process.

[0019] As the upper mold frame 1 and lower mold frame 2 move to the demolding station, the first bidirectional cylinder 5 begins to retract: its two moving ends retract synchronously towards the center of the cylinder body, driving the first mold assembly 3011 and the second mold assembly 3021 to slide along the corresponding mold assembly grooves 303 via the two sets of drive frames 4. Specifically, the two sets of first mold assemblies 3011 of the upper bladder mold 301 separate to both sides along the mold assembly grooves 303 of the upper mold frame 1, and the two sets of second mold assemblies 3021 of the lower bladder mold 302 simultaneously separate to both sides along the mold assembly grooves 303 of the lower mold frame 2. During this process, the contact area between the mold assembly and the bladder blank gradually decreases until it is completely free from the enveloping force of the cavity wall. When the first bidirectional cylinder 5 retracts to its preset stroke, both sets of first mold clamps 3011 and two sets of second mold clamps 3021 reach their maximum separation distance. The capsule preform embedded in the cavity falls naturally due to loss of support, completing the demolding action. Subsequently, the first bidirectional cylinder 5 extends again, and the drive frame 4 drives the mold clamps to reset and close, waiting to receive the next batch of capsule preforms after injection molding, entering the next work cycle.

[0020] In one embodiment of this utility model, a first auxiliary spring 6 is provided between the first mold assembly 3011 and the upper mold frame 1. A second auxiliary spring 7 is provided between the second mold assembly 3021 and the lower mold frame 2.

[0021] Specifically, during the mold closing stage, when the first bidirectional cylinder 5 extends and pushes the drive frame 4, the two sets of first mold fittings 3011 slide towards the center along the mold fitting groove 303 of the upper mold frame 1. At this time, the first auxiliary spring 6 is compressed and contracted by the mold fitting, converting part of the driving force into stored elastic potential energy. This elastic buffer can offset the rigid impact during mold closing, preventing the two sets of first mold fittings 3011 from wearing down the cavity edges due to rapid collision. At the same time, the continuous elastic force of the spring ensures a tight mold fit, preventing overflow during capsule preform molding. Similarly, the second auxiliary spring 7 contracts synchronously when the second mold fitting 3021 closes, providing stable fitting pressure for the lower capsule mold 302. Upon entering the mold-closing separation stage, the first bidirectional cylinder 5 retracts, causing the drive frame 4 to retract. The elastic potential energy of the first auxiliary spring 6 begins to be released, pushing the first mold assembly 3011 to slide to both sides along the mold-closing groove 303 through its elastic force, forming a synergistic effect with the tension of the drive frame 4. This process can accelerate the mold-closing separation speed and avoid the jamming that may occur when the drive frame 4 is under force alone. When there is slight adhesion between the mold assembly and the capsule blank, the continuous thrust of the spring can gradually overcome the adhesion resistance and prevent the capsule blank from deforming due to sudden changes in separation force. The second auxiliary spring 7 also releases its elastic force when the second mold assembly 3021 separates, assisting the two sets of second mold assemblies 3021 of the lower capsule mold 302 to slide smoothly.

[0022] In one embodiment of this utility model, a flipping mechanism 8 is also included. The flipping mechanism 8 includes a flipping bearing seat 801. The upper mold frame 1 and the lower mold frame 2 are disposed on the main frame 802. The main frame 802 rotates at the center of the flipping bearing seat 801. A flipping motor is disposed on the outer shaft of the flipping bearing seat 801. The output of the flipping motor is connected to one end of the main frame 802.

[0023] In actual operation, after the first bidirectional cylinder 5 drives the mold separation, if the capsule does not completely detach due to insufficient weight or slight adhesion, the flipping motor starts and drives the main frame 802 to rotate along the center of the flipping bearing seat 801. At this time, the upper mold frame 1 and the lower mold frame 2 tilt synchronously with the main frame 802, so that the cavity opening after mold separation faces the preset collection direction. By changing the force state of the capsule, the original simple gravity fall is transformed into a composite motion of "gravity and tilting guide force", avoiding the capsule from getting stuck in the mold gap. The flipping angle can be adjusted according to the capsule's characteristics: for softer capsules, a small flipping angle of 30°-45° is used, utilizing the tilting inertia to assist in removal. For capsules that may remain, a 180° flip can be used to make the cavity opening face downwards, and the slight vibration during mold closing, combined with the elastic deformation of the auxiliary spring during reset, will thoroughly remove the residue. After removal, the flipping motor reverses, driving the frame 802 to reset to a horizontal position, ready for the next demolding cycle. The core value of this mechanism lies in overcoming the limitations of relying solely on gravity for demolding through posture adjustment. Together with the first and second auxiliary springs 7, it forms a dual guarantee of "separation assistance and posture guidance," ensuring uniform force during mold opening and closing. The flipping mechanism 8 solves the residue problem through directional tilting, significantly improving the thoroughness of demolding. Simultaneously, the controllability of the flipping motor allows the mechanism to adapt to the production needs of capsules of different specifications and materials, enhancing the equipment's versatility.

[0024] In one embodiment of this utility model, both the upper mold frame 1 and the lower mold frame 2 slide on the main frame 802. A second bidirectional cylinder is provided on the main frame 802, and the two moving ends of the second bidirectional cylinder are respectively connected to the upper mold frame 1 and the lower mold frame 2. A first coupling groove is provided on the bottom surface of the upper mold plate 301, and a second coupling groove adapted to the first coupling groove is provided on the top surface of the lower mold plate 302.

[0025] Specifically, the first coupling groove on the bottom surface of the upper bladder mold 301 matches the second coupling groove on the top surface of the lower bladder mold 302, and this structure plays an important role during mold closing. When the second bidirectional cylinder drives the upper mold base 1 and the lower mold base 2 to approach the mold closing position, the first and second coupling grooves can precisely engage. This not only further improves the docking accuracy of the upper bladder mold 301 and the lower bladder mold 302, ensuring the accurate shape of the cavity, but also reduces capsule molding defects caused by docking deviations.

[0026] In one embodiment of the present invention, an elastic sealing ring is provided on the inner wall of the first coupling groove, and a sealing groove adapted to the elastic sealing ring is provided on the inner wall of the second coupling groove. The cross-section of the elastic sealing ring is semi-circular, and the cross-section of the sealing groove is an arc shape that matches the semi-circular shape.

[0027] Specifically, from a sealing principle perspective, when the first coupling groove and the second coupling groove are engaged, the semi-circular cross-section elastic sealing ring will precisely fit with the arc-shaped sealing groove. The deformation capability of the elastic sealing ring itself can fill any tiny gaps that may exist when the coupling grooves are joined. Even if the upper and lower mold frames 2 experience slight wear due to long-term use, the elastic recovery force of the sealing ring can still ensure tight contact with the sealing groove, preventing material leakage from the coupling groove gap during capsule formation. Compared to sealing methods that rely solely on rigid coupling, this design can adapt to dimensional errors after long-term operation of the mold frame, extending the equipment's sealing maintenance cycle.

[0028] After the injection molding process is completed, the upper mold frame 1 and the lower mold frame 2 are in the receiving position below the injection mold. At this time, the first bidirectional cylinder 5 is in the extended state, and the drive frame 4 pushes the two sets of first mold fittings 3011 to close along the mold fitting groove 303 of the upper mold frame 1 and the two sets of second mold fittings 3021 to close along the mold fitting groove 303 of the lower mold frame 2, forming a complete cavity. The first auxiliary spring 6 and the second auxiliary spring 7 are compressed and contracted by the mold fitting, and apply continuous fitting pressure through elastic potential energy. At the same time, the first coupling groove on the bottom surface of the upper capsule mold 301 and the second coupling groove on the top surface of the lower capsule mold 302 are precisely fitted. The semi-circular elastic sealing ring on the inner sidewall of the first coupling groove and the arc-shaped sealing groove on the inner sidewall of the second coupling groove are tightly fitted to achieve double sealing. The cavity shape is guaranteed by the mold fitting closure, and the material leakage is prevented by the sealing structure, ensuring that the capsule preform maintains its integrity during the transfer process. As the blank moves with the mold frame to the demolding station, the second bidirectional cylinder first drives the upper mold frame 1 and the lower mold frame 2 to slightly separate, releasing the fitting constraint of the coupling groove. Then, the first bidirectional cylinder 5 begins to retract, and the bidirectional moving ends drive the first mold fitting 3011 and the second mold fitting 3021 to slide to both sides along the mold fitting groove 303 via the drive frame 4. At this time, the first auxiliary spring 6 and the second auxiliary spring 7 release their elastic potential energy, and the elastic force and the pulling force of the drive frame 4 work together: on the one hand, accelerating the mold fitting separation speed, and on the other hand, overcoming the slight adhesion between the blank and the cavity through continuous thrust, avoiding sudden changes in separation force that could cause blank deformation. As the mold fitting separation distance increases, the blank gradually detaches from the inner wall of the cavity and finally falls naturally under gravity. If the blank is not completely detached due to insufficient weight or adhesion, the flipping mechanism 8 is activated: the flipping motor drives the main frame 802 to rotate along the flipping bearing seat 801. The upper mold frame 1 and lower mold frame 2 tilt at a small angle of 30°-45° with the main frame 802, which is suitable for soft capsules. A 180° flip is suitable for residue cleaning. The tilted posture subjectes the blank to the combined action of gravity and guiding force, and with the slight vibration generated by the elastic deformation of the auxiliary spring during reset, it completely detaches from the mold gap. After the detachment is completed, the flipping motor rotates in the opposite direction, driving the main frame 802 to reset to a horizontal state.

[0029] Finally, each component resets sequentially: the first bidirectional cylinder 5 extends, the drive frame 4 pushes the mold to close, and the first auxiliary spring 6 and the second auxiliary spring 7 retract to store energy. The second bidirectional cylinder drives the upper mold frame 1 and the lower mold frame 2 to move closer, the coupling groove re-engages, and the sealing ring and sealing groove return to a sealed state. The entire mold frame moves to below the injection mold, waiting to receive the next batch of blanks and enter the next work cycle.

[0030] In summary, the capsule demolding mechanism of this utility model avoids the squeezing of the capsule caused by the demolding action and reduces the possibility of capsule deformation.

[0031] In the description of this specification, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0033] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A capsule demolding mechanism characterized by, include: An upper mold frame (1) and a lower mold frame (2) are provided below the injection molding of the capsule production equipment; Multiple capsule molds (3), each capsule mold (3) includes an upper capsule mold (301) and a lower capsule mold (302). Multiple upper capsule molds (301) are disposed inside the upper mold frame (1), and multiple lower capsule molds (302) are disposed inside the lower mold frame (2). The upper bladder template (301) includes two sets of first mold parts (3011), and the lower bladder template (302) includes two sets of second mold parts (3021). Both the upper mold frame (1) and the lower mold frame (2) are provided with mold parting grooves (303). The two sets of first mold parts (3011) slide inside the mold parting grooves (303) of the upper mold frame (1), and the two sets of second mold parts (3021) slide inside the mold parting grooves (303) of the lower mold frame (2). Two sets of drive frames (4) are slidably arranged on the bottom surface of the lower mold frame (2). One set of drive frames (4) is connected to the first mold assembly (3011), and the other set of drive frames (4) is connected to the second mold assembly (3021). A first bidirectional cylinder (5) is fixed on the bottom surface of the lower mold frame (2). The two moving ends of the first bidirectional cylinder (5) are respectively connected to the two sets of drive frames (4).

2. A capsule demoulding mechanism according to claim 1, characterised in that, A first auxiliary spring (6) is provided between the first mold assembly (3011) and the upper mold frame (1). A second auxiliary spring (7) is provided between the second mold assembly (3021) and the lower mold frame (2).

3. The capsule demolding mechanism according to claim 1, characterized in that, It also includes a flipping mechanism (8), which includes a flipping bearing seat (801) and a main frame (802). The upper mold frame (1) and the lower mold frame (2) are disposed on the main frame (802). The main frame (802) rotates at the center of the flipping bearing seat (801). A flipping motor is disposed on the outer shaft of the flipping bearing seat (801). The output of the flipping motor is connected to one end of the main frame (802).

4. A capsule demoulding mechanism according to claim 3, characterised in that, The upper mold frame (1) and the lower mold frame (2) both slide on the main frame (802); The main frame (802) is provided with a second bidirectional cylinder, and the two moving ends of the second bidirectional cylinder are respectively connected to the upper mold frame (1) and the lower mold frame (2); The bottom surface of the upper bladder template (301) is provided with a first coupling groove, and the top surface of the lower bladder template (302) is provided with a second coupling groove that is adapted to the first coupling groove.

5. A capsule demoulding mechanism according to claim 4, characterised in that, The inner wall of the first coupling groove is provided with an elastic sealing ring, and the inner wall of the second coupling groove is provided with a sealing groove that is adapted to the elastic sealing ring. The cross-section of the elastic sealing ring is semi-circular, and the cross-section of the sealing groove is an arc shape that matches the semi-circular shape.

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