Bottle blowing machine with unlocking and locking mechanism

Abstract

The invention discloses a bottle blowing machine with an unlocking and locking mechanism, which comprises a rack, a fixed shaft, a first side die and a second side die, and the unlocking and locking mechanism comprises a fixed buckle fixedly arranged on the first side die and a movable buckle rotatably arranged in the second side die in a penetrating manner; the movable buckle comprises a cylindrical shaft body and a buckle groove formed in the shaft body in a concave mode in the radial direction, and the axis direction of the shaft body is parallel to the fixed shaft. The fixing buckle comprises a plate body and a hook part convexly arranged on the plate body; the buckle groove comprises a movable buckle face used for abutting against the hook part in a matched mode, and the distance between the movable buckle face and the axis of the shaft body in the radial direction is smaller than the turning radius of the shaft body. When the bottle blowing machine is closed, the movable buckle is used for positively rotating until the movable buckle surface is propped against the hook part, and the unlocking and locking mechanism is in a locked state; and when the bottle blowing machine opens the mold, the movable buckle is used for reversely rotating until the movable buckle surface is separated from the hook part, and the unlocking and locking mechanism is in an unlocking state. According to the bottle blowing machine with the locking and unlocking mechanism, locking abnormity can be reduced, and the risk of bottle explosion caused by tripping is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of bottle blowing machines, in particular to a bottle blowing machine with an opening and closing locking mechanism. Background Art

[0002] The molding die set on the rotary bottle blowing machine for molding plastic blanks into plastic containers includes: a frame and a central axis fixedly mounted on the frame, two side molds at least one of which can swing around the central axis, a bottom mold frame that can move relative to the frame along the axial direction of the central axis, two split side molds of the plastic container supported by the two side molds, and a bottom mold of the plastic container supported by the bottom mold frame.

[0003] When the two side molds and the bottom mold frame are closed, the two split side molds and the bottom mold of the plastic container can form a hollow cavity, and the plastic blank can be formed into a plastic container by using the hollow cavity; when the two side molds and the bottom mold frame are opened, the formed plastic container can be taken out and the plastic blank to be formed can be fed into it.

[0004] The opening and closing locking device of the two side molds of the rotary bottle blowing machine locks the two side molds with each other when the two side molds are closed to form the plastic blank into a plastic container, thereby achieving the locking of the two side molds; before taking out the formed plastic container and feeding the plastic blank to be formed, the opening and closing locking device releases the mutual locking of the two side molds to achieve the unlocking of the two side molds.

[0005] In the prior art, the opening and closing of the two side molds is achieved by a pair of mutually hooked fixed buckles and movable buckles, which has the following disadvantages:

[0006] Since the movable buckle and the movable buckle shaft are two parts, the distance between the movable buckle bearing surface and the axis of the movable buckle shaft is large due to the constraints of the movable buckle structure, which requires the movable buckle to be driven by a torsion spring with a large torque to overcome the friction between the movable buckle and the fixed buckle bearing surface to achieve locking, which is prone to locking abnormalities;

[0007] Since the movable buckle and the fixed buckle must rotate relative to each other to unlock in the locked state, the normal line at the centroid of the movable buckle's bearing surface must deviate from the axis of the movable buckle's rotating shaft. This makes the movable buckle bear a large torque in the unlocking direction when the bearing surfaces of the movable buckle and the fixed buckle are pressed against each other under the action of the internal pressure of the bottle being blown, and the risk of the bottle being disengaged and exploding is relatively high. Summary of the invention

[0008] The object of the present invention is to provide a bottle blowing machine with an opening and closing locking mechanism, which can reduce locking anomalies and reduce the risk of bottle tripping and explosion.

[0009] In order to achieve the above object, the technical solution adopted by the present invention is:

[0010] A bottle blowing machine with an opening and closing locking mechanism, the bottle blowing machine comprising a frame, a fixed shaft arranged on the frame, a first side mold and a second side mold which can be relatively rotated to open and close, at least one of the first side mold and the second side mold can rotate around the axis of the fixed shaft, the opening and closing locking mechanism comprises a fixed buckle fixedly arranged at the open end of the first side mold, and a movable buckle which can be rotated around its own axis and penetrated in the open end of the second side mold; the movable buckle comprises a cylindrical shaft body, a buckle groove radially recessed on the shaft body, and the axis direction of the shaft body is parallel to the fixed shaft; the fixed buckle comprises a plate body, and a hook portion convexly arranged on the plate body; the buckle groove comprises a movable buckle surface for cooperating with the hook portion, and the distance between the movable buckle surface and the axis of the shaft body in the radial direction is less than the rotation radius of the shaft body;

[0011] The unlocking and locking mechanism has a locked state and an unlocked state:

[0012] When the bottle blowing machine is in mold closing, the movable buckle is used to rotate forward until the movable buckle surface abuts against the hook portion, and the opening and closing locking mechanism is in the locking state;

[0013] When the bottle blowing machine opens the mold, the movable buckle is used to rotate in the opposite direction until the movable buckle surface is separated from the hook part, and the opening and closing locking mechanism is in the unlocking state.

[0014] Preferably, at least two groups of buckle grooves are spaced apart on the shaft body along the axial centerline direction thereof, the opening end of the second side mold is provided with side mold concave portions aligned one by one with the buckle grooves, and side mold convex portions are provided between adjacent side mold concave portions.

[0015] More preferably, the length direction of the plate body is parallel to the shaft body, at least two groups of the hooks are arranged on the plate body along the length direction thereof, and plate recesses are arranged between adjacent hooks, the hooks are aligned one by one with the buckle grooves, and the plate recesses are aligned one by one with the convex parts of the side molds;

[0016] When the bottle blowing machine is in mold closing mode, the convex part of the side mold is used to be fittedly embedded in the concave part of the plate.

[0017] Preferably, the hook portion is L-shaped, and the opening of the hook portion faces the mold center.

[0018] Preferably, the hook portion is L-shaped, and the opening of the hook portion faces away from the mold center.

[0019] Preferably, the movable buckle has a first limit position and a second limit position when rotating relative to the second side mold:

[0020] When the movable buckle is in the first extreme position, the buckle groove and the hook portion are separated from each other, thereby allowing the fixed buckle to move relative to the movable buckle;

[0021] When the movable buckle is in the second extreme position, the buckle groove and the hook portion abut against each other, thereby preventing the fixed buckle from moving relative to the movable buckle.

[0022] Preferably, the hook portion includes a fixed buckle surface for fittingly fitting the movable buckle surface.

[0023] More preferably, the fixed buckle surface and the movable buckle surface are respectively planes for fitting together.

[0024] More preferably, the fixed buckle surface and the movable buckle surface are respectively a convex arc surface and a concave arc surface for fitting with each other.

[0025] More preferably, the fixed buckle surface and the movable buckle surface are respectively special-shaped surfaces for fitting with each other.

[0026] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: the bottle blowing machine with an opening and closing mechanism of the present invention has the following advantages:

[0027] The movable buckle is both the rotating shaft of the rotating pair and the locking member of the locking structure, and has a simple structure and is easy to manufacture;

[0028] During the locking process, the movable buckle and the fixed buckle rotate relative to each other, and the movable buckle surface and the fixed buckle are fitted and fastened with each other. During this process, friction is inevitably present between the movable buckle surface and the fixed buckle. To overcome the friction and realize locking, a sufficiently large torque must be applied to the movable buckle. The magnitude of this torque depends on two factors: one is the friction between the movable buckle surface and the fixed buckle, and the other is the distance between the movable buckle surface (that is, the friction force line) and the axis of rotation of the movable buckle. By arranging the buckle groove radially inwardly on the shaft body, the distance between the movable buckle surface and the axis of rotation of the movable buckle is smaller. On the basis of the constant friction between the movable buckle surface and the fixed buckle, the torque required to drive the movable buckle to fasten is also smaller, which is not only conducive to the design of the torsion spring for opening and closing the lock, but also conducive to reducing locking abnormalities.

[0029] In the locked state, the movable buckle and the fixed buckle must rotate relative to each other to unlock. If the buckle surfaces of the movable buckle and the fixed buckle are planes, the normal at the centroid of the movable buckle surface must deviate from the rotation axis centerline of the movable buckle. Then, when the buckle surfaces of the movable buckle and the fixed buckle are pressed against each other under the internal pressure of the blown bottle, the movable buckle will be subjected to a large torque in the unlocking direction, which may easily cause the buckle to come loose and the bottle to explode. In the present application, the movable buckle is a functional combination of the shaft and the buckle. The outer cylindrical surface diameter of the shaft body (i.e., the shaft diameter) is large, and the friction circle radius of the rotating pair formed by the movable buckle and the second side mold is also large. Since the friction circle radius of the rotating pair is proportional to the shaft diameter, the holding torque required to prevent the movable buckle from coming loose and exploding the bottle is also small, which can effectively reduce the risk of the bottle coming loose and exploding. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Attached Figure 1 This is a structural schematic diagram of a bottle blowing machine with an opening and closing mechanism according to Example 1;

[0031] Attached Figure 2 It is a front view of the bottle blowing machine with an opening and closing mechanism of the first embodiment;

[0032] Attached Figure 3 For attachment Figure 2 Sectional view along line AA (locked state);

[0033] Attached Figure 4 For attachment Figure 2 Sectional view along line AA (unlocked state);

[0034] Attached Figure 5 It is a structural schematic diagram of an active buckle;

[0035] Attached Figure 6 For attachment Figure 5 Sectional view along line BB;

[0036] Attached Figure 7 is a schematic diagram of the structure of the fixing buckle;

[0037] Attached Figure 8 This is a structural schematic diagram of a bottle blowing machine with an opening and closing mechanism according to the second embodiment;

[0038] Attached Fig. 9 It is a front view of the bottle blowing machine with an opening and closing mechanism of the second embodiment;

[0039] Attached Fig.10 For attachment Fig. 9 Sectional view along line AA (locked state);

[0040] Attached Fig.11 For attachment Fig. 9 Sectional view along line AA (unlocked state).

[0041] Among them: 1. driving swing arm; 2. fixed shaft; 3. first side mold; 4. second side mold; 41. side mold concave part; 42. side mold convex part; 5. fixing buckle; 51. plate body; 52. hook; 521. fixing buckle surface; 53. plate concave part; 6. movable buckle; 61. shaft body; 62. buckle groove; 621. movable buckle surface. DETAILED DESCRIPTION

[0042] The technical solution of the present invention is further described below in conjunction with specific embodiments and drawings.

[0043] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the embodiments of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0044] In the description of the embodiments of the present invention, it should be understood that the terms "length", "inside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the embodiments of the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present invention, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0046] In the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0047] In the embodiments of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0048] The disclosure below provides many different embodiments or examples to implement different structures of the embodiments of the present invention. In order to simplify the disclosure of the embodiments of the present invention, the parts and settings of specific examples are described below. Of course, they are only examples, and the purpose is not to limit the embodiments of the present invention. In addition, the embodiments of the present invention can repeat reference numbers and / or reference letters in different examples, and this repetition is for the purpose of simplification and clarity, which itself does not indicate the relationship between the various embodiments and / or settings discussed.

[0049] See also Figure 1-2 As shown, embodiment 1 provides a bottle blowing machine with an opening and closing mechanism, the bottle blowing machine includes a frame, a fixed shaft 2 arranged on the frame, a first side mold 3 and a second side mold 4 that can rotate relatively to open and close, at least one of the first side mold 3 and the second side mold 4 can be rotatably arranged on the frame around the axis of the fixed shaft 2. In this embodiment, it is a double-opening mold frame, that is, the first side mold 3 and the second side mold 4 can be rotatably mounted on the fixed shaft 2.

[0050] See also Figure 3-7 As shown, the opening and closing locking mechanism includes a fixed buckle 5 fixedly mounted on the open end of the first side mold 3, and a movable buckle 6 rotatably mounted around its own axial line and inserted into the open end of the second side mold 4. The lower end of the movable buckle 6 extends downward from the open end of the second side mold 4, and the movable buckle 6 is driven to rotate by a driving swing arm 1 installed at the lower end of the movable buckle 6.

[0051] The movable buckle 6 includes a cylindrical shaft body 61, a buckle groove 62 radially recessed on the shaft body 61, and the buckle groove 62 includes a movable buckle surface 621 for matching with the hook portion 52, and the distance between the movable buckle surface 621 and the axis of the shaft body 61 in the radial direction is less than the rotation radius of the shaft body 61. The axis of the shaft body 61 is parallel to the fixed shaft 2, and a through hole for the shaft body 61 to penetrate is opened in the open end of the second side mold 4.

[0052] See also Figure 1 , Figure 5 As shown, at least two groups of buckle grooves 62 are arranged on the shaft body 61 at intervals along its axial centerline direction, and the open end of the second side mold 4 is provided with side mold recesses 41 that are aligned one by one with the buckle grooves 62 along the axial centerline direction of the vertical fixed shaft 2, and side mold protrusions 42 are provided between adjacent side mold recesses 41. By providing the side mold recesses 41, the buckle grooves 62 can be exposed to the outside of the second side mold 4 to cooperate with the fixing buckle 5 for locking and unlocking.

[0053] The fixing buckle 5 includes a plate body 51, a hook portion 52 protruding from the plate body 51, and the hook portion 52 includes a fixing buckle surface 521 for fittingly fitting the movable buckle surface 621. In this embodiment, the hook portion 52 is L-shaped, and the opening of the hook portion 52 faces away from the mold center, that is, the opening is arranged outward.

[0054] The length direction of the plate body 51 is parallel to the shaft body 61. Figure 1 , Figure 7 As shown, at least two groups of hooks 52 are arranged on the plate body 51 along its length direction, and a plate recess 53 is arranged between adjacent hooks 52. The hooks 52 and the buckle grooves 62 are aligned one by one along the axis direction of the vertical fixed shaft 2, and the plate recess 53 and the side mold protrusion 42 are aligned one by one along the axis direction of the vertical fixed shaft 2. When the bottle blowing machine is closed, the side mold protrusion 42 is used to be embedded in the plate recess 53 in a matching manner.

[0055] In the first implementation of this embodiment, the fixed buckle surface 521 and the movable buckle surface 621 are respectively planes for fitting together;

[0056] In the second implementation of this embodiment, the fixed buckle surface 521 and the movable buckle surface 621 are respectively a convex arc surface and a concave arc surface for fitting with each other;

[0057] In the third implementation of the present embodiment, the fixed buckle surface 521 and the movable buckle surface 621 are respectively special-shaped surfaces for fitting together.

[0058] The movable buckle 6 has a first limit position and a second limit position when rotating relative to the second side mold 4:

[0059] When the movable buckle 6 is in the first extreme position, the buckle groove 62 and the hook portion 52 are separated from each other, thereby allowing the fixed buckle 5 to move relative to the movable buckle 6;

[0060] When the movable buckle 6 is at the second extreme position, the buckle groove 62 and the hook portion 52 abut against each other, thereby preventing the fixed buckle 5 from moving relative to the movable buckle 6 .

[0061] The above-mentioned unlocking and locking mechanism has a locked state and an unlocked state:

[0062] When the bottle blowing machine is in mold closing, the movable buckle 6 is used to rotate forward until the movable buckle surface 621 abuts against the fixed buckle surface 521 of the hook portion 52, and the opening and closing locking mechanism is in a locked state;

[0063] When the bottle blowing machine opens the mold, the movable buckle 6 is used to rotate in the opposite direction until the movable buckle surface 621 is separated from the fixed buckle surface 521 of the hook portion 52, and the opening and closing locking mechanism is in the unlocking state.

[0064] See also Figure 8-11 As shown, the second embodiment provides a bottle blowing machine with an opening and closing locking mechanism. The difference between the second embodiment and the first embodiment mainly lies in that the opening of the hook portion 52 faces the mold center, that is, the opening is arranged inward.

[0065] The working process of this embodiment is described in detail below:

[0066] When opening the mold, the swing arm 1 is driven to drive the movable buckle 6 to rotate in the opposite direction until the movable buckle surface 621 is separated from the fixed buckle surface 521 of the hook 52, and the movable buckle 6 is switched from the second limit position to the first limit position, allowing the fixed buckle 5 to move relative to the movable buckle 6, and the opening and closing locking mechanism is in the unlocking state, and the first side mold 3 and the second side mold 4 are relatively rotated and opened;

[0067] When the mold is closed, the first side mold 3 and the second side mold 4 rotate relative to each other and close, and the movable buckle 6 is driven by the swing arm 1 to rotate forward until the movable buckle surface 621 abuts against the fixed buckle surface 521 of the hook 52, and the movable buckle 6 switches from the first extreme position to the second extreme position, preventing the fixed buckle 5 from moving relative to the movable buckle 6, and the opening and closing locking mechanism is in a locked state.

[0068] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with this technology to understand the content of the present invention and implement it. They cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A bottle blowing machine with an opening and closing mechanism, comprising a frame, a fixed shaft arranged on the frame, a first side mold and a second side mold that can be relatively rotated to open and close, at least one of the first side mold and the second side mold can rotate around the axis of the fixed shaft, characterized in that: The opening and closing locking mechanism includes a fixed buckle fixed to the opening end of the first side mold, and a movable buckle rotatably arranged around its own axis and inserted into the opening end of the second side mold; the movable buckle includes a cylindrical shaft body and a buckle groove radially recessed on the shaft body, and the axis direction of the shaft body is parallel to the fixed shaft; the fixed buckle includes a plate body and a hook portion convexly arranged on the plate body; the buckle groove includes a movable buckle surface for cooperating with the hook portion, and the distance between the movable buckle surface and the axis of the shaft body in the radial direction is less than the rotation radius of the shaft body; The unlocking and locking mechanism has a locked state and an unlocked state: When the bottle blowing machine is in mold closing, the movable buckle is used to rotate forward until the movable buckle surface abuts against the hook portion, and the opening and closing locking mechanism is in the locking state; When the bottle blowing machine opens the mold, the movable buckle is used to rotate in the opposite direction until the movable buckle surface is separated from the hook portion, and the opening and closing locking mechanism is in the unlocking state.

2. The bottle blowing machine with an opening and closing mechanism according to claim 1, characterized in that: At least two groups of buckle grooves are arranged on the shaft body at intervals along the axial centerline direction thereof, the opening end of the second side mold is provided with side mold concave portions aligned one by one with the buckle grooves, and side mold convex portions are provided between adjacent side mold concave portions.

3. The bottle blowing machine with an opening and closing mechanism according to claim 2, characterized in that: The length direction of the plate body is parallel to the shaft body, at least two groups of hooks are arranged on the plate body along the length direction thereof, and plate recesses are arranged between adjacent hooks, the hooks are aligned one by one with the buckle grooves, and the plate recesses are aligned one by one with the convex parts of the side molds; When the bottle blowing machine is in mold closing mode, the convex part of the side mold is used to be fittedly embedded in the concave part of the plate.

4. The bottle blowing machine with an opening and closing mechanism according to claim 1, characterized in that: The hook portion is L-shaped, and the opening of the hook portion faces the mold center.

5. The bottle blowing machine with an opening and closing mechanism according to claim 1, characterized in that: The hook portion is L-shaped, and the opening of the hook portion faces away from the mold center.

6. The bottle blowing machine with an opening and closing mechanism according to claim 1, characterized in that: The movable buckle has a first limit position and a second limit position when rotating relative to the second side mold: When the movable buckle is in the first extreme position, the buckle groove and the hook portion are separated from each other, thereby allowing the fixed buckle to move relative to the movable buckle; When the movable buckle is in the second extreme position, the buckle groove and the hook portion abut against each other, thereby preventing the fixed buckle from moving relative to the movable buckle.

7. The bottle blowing machine with an opening and closing mechanism according to claim 1, characterized in that: The hook portion includes a fixed buckle surface for fittingly fitting the movable buckle surface.

8. The bottle blowing machine with an opening and closing mechanism according to claim 7, characterized in that: The fixed buckle surface and the movable buckle surface are respectively planes used to fit each other.

9. The bottle blowing machine with an opening and closing mechanism according to claim 7, characterized in that: The fixed buckle surface and the movable buckle surface are respectively a convex arc surface and a concave arc surface for fitting with each other.

10. The bottle blowing machine with an opening and closing mechanism according to claim 7, characterized in that: The fixed buckle surface and the movable buckle surface are respectively special-shaped surfaces for fitting with each other.

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