A bottom mold connection device capable of magnetic coupling

Abstract

The present invention discloses a bottom mold connection device capable of magnetic coupling, comprising a first connection seat for connecting the bottom mold, a second connection seat for connecting the bottom mold support, the first connection seat and the second connection seat are magnetically coupled through a first magnetic member and a second magnetic member; the first connection seat and the second connection seat are arranged along a first direction, and the first connection seat can be reciprocated relative to the second connection seat along a perpendicular first direction and is arranged on the second connection seat; the bottom mold connection device also includes an annular groove on one of the first connection seat and the second connection seat, an annular protrusion on the other and arranged in the annular groove, and an elastic flexible ring arranged between the first side wall of the annular groove and the second side wall of the annular protrusion; the arrangement direction of the first side wall, the flexible ring, and the second side wall is perpendicular to the first direction. The present invention provides a bottom mold connection device capable of magnetic coupling, which can avoid damage to the connection structure between the bottom mold and the bottom mold support when the bottom mold moves compensatingly.

Description

Technical Field

[0001] The invention relates to the technical field of bottle blowing, and in particular to a bottom mold connecting device capable of magnetic coupling. Background Art

[0002] The bottle blowing machine is a key equipment for producing bottles for various liquid packaging. Plastic bottles are blown from preforms. The heated preforms are sent to the molds (including the left mold, the right mold and the bottom mold). The molds are closed, and the clamping mechanism locks the molds. Compensating gas is introduced into one side of the mold to reduce the gap between the left and right molds. Then the sealing unit seals the bottle mouth, and the stretching unit stretches the preform while injecting high-pressure gas according to a certain process to make the preform close to the inner wall of the mold to form a bottle.

[0003] In the prior art, the bottom mold is generally rigidly connected and locked to the bottom mold bracket. The disadvantages of this structure are: 1) when the compensation gas is introduced, the mold and the bottom mold on the side where the compensation gas is introduced will move toward the fixed side mold, which may easily cause the positioning pin to break or other parts to be damaged; 2) when blowing the bottle, there is a lot of noise and impact, which affects the speed and efficiency of the bottle blowing machine. Summary of the invention

[0004] The object of the present invention is to provide a magnetically coupled bottom mold connecting device, in which the bottom mold and the bottom mold bracket are flexibly connected, and the bottom mold can move toward the fixed side of the mold for compensation after the mold is closed, while avoiding damage to the connection structure between the bottom mold and the bottom mold bracket.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A bottom mold connecting device capable of magnetic coupling comprises a first connecting seat for connecting the bottom mold, a second connecting seat for connecting the bottom mold support, a first magnetic member arranged on the first connecting member seat, and a second magnetic member arranged on the second connecting seat, wherein the first connecting seat and the second connecting seat are magnetically coupled via the first magnetic member and the second magnetic member;

[0007] The first connection seat and the second connection seat are arranged along a first direction, and the first connection seat is arranged on the second connection seat so as to be reciprocating relative to the second connection seat along a direction perpendicular to the first direction;

[0008] The bottom mold connection device also includes an annular groove provided on one of the first connection seat and the second connection seat, an annular protrusion provided in the annular groove on the other of the first connection seat, and an elastic flexible ring provided between a first side wall of the annular groove and a second side wall of the annular protrusion;

[0009] The first side wall, the flexible ring, and the second side wall are arranged in a direction perpendicular to the first direction.

[0010] Preferably, there are two groups of the annular groove, the annular protrusion, and the flexible ring, two of the flexible rings are spaced apart and arranged perpendicular to the first direction, and the first magnetic member and the second magnetic member are respectively arranged between the two flexible rings.

[0011] More preferably, the two flexible rings are arranged along the first direction, one of which is arranged on the outside of the first magnetic member or the second magnetic member, and the other of which is arranged on the inside of the second magnetic member or the first magnetic member.

[0012] Preferably, the first connecting seat and the second connecting seat are cylindrical respectively, the first connecting seat and the second connecting seat are arranged along the axial direction, and the first connecting seat can be arranged on the second connecting seat to reciprocate radially relative to the second connecting seat; the first side wall, the flexible ring, and the second side wall are sequentially abutted in the radial direction.

[0013] More preferably, there are a plurality of the first magnetic members, which are evenly spaced and arranged along the circumferential direction, and the centers of the plurality of the first magnetic members are located on the center line of the flexible ring.

[0014] Preferably, the first magnetic member and the second magnetic member are arranged along the first direction, the first magnetic member is recessed in a side surface of the first connecting seat facing the second connecting seat, and the second magnetic member is recessed in a side surface of the second connecting seat facing the first connecting seat.

[0015] Preferably, the first magnetic member is connected to the first connection seat by bonding, nesting, or screw fixing, and the second magnetic member is connected to the second connection seat by bonding, nesting, or screw fixing.

[0016] Preferably, when the first connection seat and the second connection seat are magnetically attracted to each other, the first connection seat can move relative to the second connection seat in a direction perpendicular to the first direction, and one side of the flexible ring is squeezed and deformed.

[0017] More preferably, when the first magnetic member is reset relative to the second magnetic member, the squeezed flexible ring is used to provide an elastic restoring force to eliminate a reset dead zone between the two.

[0018] Preferably, the first connecting seat is provided with a mounting sleeve for mounting the bottom mold.

[0019] Due to the application of the above technical scheme, the present invention has the following advantages compared with the prior art: the present invention provides a magnetically coupled bottom mold connecting device, in which the bottom mold and the bottom mold bracket are magnetically coupled along a first direction through a first magnetic part and a second magnetic part, and elastically abutted along a direction perpendicular to the first direction through a flexible ring; after mold closing, the bottom mold and the mold on the compensation air inlet side can move as a whole toward the fixed side mold, and when the bottom mold moves relative to the bottom mold bracket for compensation, due to the flexible connection between the first connecting seat and the second connecting seat, the rigid impact can be reduced and the damage to the connection structure between the two can be avoided; the bottom mold connecting device can support the bottom mold to move in any direction within the plane perpendicular to the first direction to perform mold closing compensation; after bottle blowing is completed, the first connecting seat is reset under the coupling of magnetic lines of force, and the reset dead zone caused by friction between the first magnetic part and the second magnetic part is eliminated by the elastic restoring force provided by the squeezed flexible ring, so as to facilitate smooth mold opening; at the same time, this flexible connection can reduce vibration and noise, and is conducive to the smooth and efficient operation of the whole machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Attached Figure 1 is a structural schematic diagram of a bottom mold connecting device according to a specific embodiment of the present invention;

[0021] Attached Figure 2 Schematic diagram of a cross-sectional view of a bottom mold connection device according to a specific embodiment of the present invention Figure 1 ;

[0022] Attached Figure 3 Schematic diagram of a cross-sectional view of a bottom mold connection device according to a specific embodiment of the present invention Figure 2 .

[0023] Among them: 1. first connecting seat; 11. mounting sleeve; 12. upper split; 13. lower split; 2. second connecting seat; 3. first magnetic member; 4. second magnetic member; 5. annular groove; 51. first side wall; 6. annular protrusion; 61. second side wall; 7. flexible ring. DETAILED DESCRIPTION

[0024] The technical solution of the present invention is further described below in conjunction with specific embodiments and drawings.

[0025] See also Figure 1-3 As shown, this embodiment provides a magnetically coupled bottom mold connecting device, including a first connecting seat 1 for connecting a bottom mold (not shown in the figure), a second connecting seat 2 for connecting a bottom mold bracket (not shown in the figure), a first magnetic member 3 arranged on the first connecting member seat, and a second magnetic member 4 arranged on the second connecting seat 2. The first connecting seat 1 and the second connecting seat 2 are magnetically coupled through the first magnetic member 3 and the second magnetic member 4.

[0026] The first connection seat 1 and the second connection seat 2 are arranged along a first direction (i.e. Figure 2The first connection seat 1 is arranged in the up-down direction in the middle, and the first connection seat 1 is located above the second connection seat 2. The first connection seat 1 can be reciprocated relative to the second connection seat 2 along a vertical first direction and is arranged on the second connection seat 2.

[0027] See also Figure 1-2 As shown, in this embodiment, the first connection seat 1 and the second connection seat 2 are cylindrical, and a mounting sleeve 11 for mounting the bottom mold is provided at the center of the first connection seat 1. The first connection seat 1 is formed by an upper sub-body 12 and a lower sub-body 13 assembled and assembled by screws, and the upper sub-body 12 and the lower sub-body 13 located therebelow are abutted in sequence along a first direction, and the mounting sleeve 11 simultaneously penetrates the upper sub-body 12 and the lower sub-body 13 along the first direction.

[0028] See also Figure 2-3 As shown, the lower surface of the lower body 13 is recessed upward to form a first slot for placing the first magnetic member 3, and the upper surface of the second connecting seat 2 is recessed downward to form a second slot for placing the second magnetic member 4. The first magnetic member 3 and the second magnetic member 4 are aligned along the first direction and adsorbed to each other, so that the first connecting seat 1 and the second connecting seat 2 can be magnetically adsorbed and connected along the first direction.

[0029] The first magnetic member 3 can be connected to the first slot by bonding, nesting, or screw fixing, and the second magnetic member 4 can be connected to the second slot by bonding, nesting, or screw fixing. Figure 2 As shown, the first magnetic member 3 and the first slot hole are fixedly connected with through-hole screws, and the second magnetic member 4 and the second slot hole are also fixedly connected with through-hole screws.

[0030] One of the first connection seat 1 and the second connection seat 2 is provided with an annular groove 5, and the other is provided with an annular protrusion 6 located in the annular groove. The magnetically coupled bottom mold connection device further includes an elastic flexible ring 7 disposed between a first side wall 51 of the annular groove 5 and a second side wall 61 of the annular protrusion 6. The arrangement direction of the first side wall 51, the flexible ring 7, and the second side wall 61 is perpendicular to the first direction.

[0031] See also Figure 2 As shown, there are two groups of annular grooves 5, annular protrusions 6, and flexible rings 7, which are arranged at intervals along the radial direction. In this embodiment, the annular grooves 5, annular protrusions 6, and flexible rings 7 are all circular and arranged coaxially, and the first side wall 51, the flexible ring 7, and the second side wall 61 are sequentially abutted in the radial direction.

[0032] There are multiple first magnetic members 3, which are evenly spaced and arranged along the circumferential direction, and the center of the multiple first magnetic members 3 is located on the center line of the flexible ring 7; there are multiple second magnetic members 4, which are evenly spaced and arranged along the circumferential direction, and the center of the multiple second magnetic members 4 is located on the center line of the flexible ring 7. The multiple first magnetic members 3 and the multiple second magnetic members 4 are respectively located between the two flexible rings 7.

[0033] Through this arrangement, when the bottom mold moves the first connecting seat 1 relative to the second connecting seat 2 along any direction perpendicular to the first direction the same distance, the friction force overcome between the first magnetic member 3 and the second magnetic member 4 is the same, thereby ensuring the stability of the radial movement of the first connecting seat 1 relative to the second connecting seat 2.

[0034] See also Figure 2 As shown, two annular protrusions 6 are both convexly arranged downward on the lower surface of the lower split body 13, and two annular grooves 5 are both concavely arranged downward on the upper surface of the second connecting seat 2. Two flexible rings 7 are arranged along the first direction, the outer flexible ring 7 is at the same height as the second magnetic member 4 below, and the inner flexible ring 7 is at the same height as the first magnetic member 3 above.

[0035] In another embodiment, the outer flexible ring 7 is at the same height as the upper first magnetic member 3 , and the inner flexible ring 7 is at the same height as the lower second magnetic member 4 .

[0036] Through this arrangement, the movement of the first connecting seat 1 relative to the second connecting seat 2 in the radial direction is more stable, and the two are prevented from being axially disengaged from each other when the first connecting seat 1 moves relative to the second connecting seat 2 in the radial direction.

[0037] When the first connection seat 1 and the second connection seat 2 are magnetically attracted to each other, the first connection seat 1 can move relative to the second connection seat 2 along the first direction perpendicular to the first direction, at which time one side of the flexible ring 7 is further squeezed and deformed, and the other side is released. This is because when the first connection seat 1 and the second connection seat 2 are normally connected (before the bottom mold compensation movement), in order to ensure the flexible connection between the two, the flexible ring 7 between the two will be pre-extruded, and the flexible ring 7 that is uniformly pre-extruded along the circumferential direction will not drive the first connection seat 1 to move relative to the second connection seat 2.

[0038] After bottle blowing is completed, when the first magnetic member 3 is reset relative to the second magnetic member 4, the sliding friction between the first magnetic member 3 and the second magnetic member 4 will prevent the two from being completely reset under the action of magnetic force line coupling. In other words, there is a reset dead zone between the two. At this time, the elastic restoring force that eliminates the reset dead zone between the two is provided by the squeezed flexible ring 7, and the flexible ring 7 drives the first connecting seat 1 to completely reset relative to the second connecting seat 2 to restore to a uniform pre-squeezed state along its own circumference.

[0039] Obviously, the maximum deformation that the flexible ring 7 can reach in the radial direction is smaller than the radial width of the first magnetic part 3 and the second magnetic part 4, so as to avoid the first magnetic part 3 and the corresponding second magnetic part 4 being completely disengaged when the first connecting seat 1 moves relative to the second connecting seat 2, and the magnetic adsorption force between the first magnetic part 3 and the corresponding second magnetic part 4 can be maintained.

[0040] The bottom mold and the bottom mold support are magnetically coupled along the first direction through the first magnetic member 3 and the second magnetic member 4, and elastically abutted along the perpendicular first direction through the flexible ring 7. After mold closing, when the bottom mold moves relative to the bottom mold support for mold closing compensation, the first connecting seat 1 and the second connecting seat 2 are flexibly connected, which can reduce rigid impact and avoid damage to the connection structure between the two; the bottom mold connection device can support the bottom mold to move in any direction within the plane perpendicular to the first direction to perform mold closing compensation, and has a wide range of applications; after bottle blowing is completed, the first connecting seat 1 is reset under the coupling of magnetic lines of force, and the reset dead zone caused by friction between the first magnetic member 3 and the second magnetic member 4 is eliminated by the elastic restoring force provided by the squeezed flexible ring 7, so as to facilitate smooth mold opening.

[0041] The working process of this embodiment is described in detail below:

[0042] After mold closing, compensation gas is introduced into one side of the mold, so that the mold on this side and the bottom mold move synchronously to the other side, and the first connecting seat 1 moves synchronously relative to the second connecting seat 2 until the mold closing compensation is completed, at which time the flexible ring 7 is further squeezed and deformed;

[0043] After bottle blowing is completed, the supply of compensation gas is stopped. Under the action of magnetic line coupling, the first connecting seat 1 is reset relative to the second connecting seat 2. The reset dead zone between the two is eliminated by the rebound flexible ring 7, so that the first connecting seat 1 is completely reset relative to the second connecting seat 2.

[0044] 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 magnetically coupled bottom mold connection device, characterized in that: The invention comprises a first connection seat for connecting the bottom mold, a second connection seat for connecting the bottom mold support, a first magnetic member arranged on the first connection seat, and a second magnetic member arranged on the second connection seat, wherein the first connection seat and the second connection seat are magnetically coupled through the first magnetic member and the second magnetic member; The first connection seat and the second connection seat are arranged along a first direction, and the first connection seat is arranged on the second connection seat so as to be reciprocating relative to the second connection seat along a direction perpendicular to the first direction; The bottom mold connection device also includes an annular groove provided on one of the first connection seat and the second connection seat, an annular protrusion provided on the other of the first connection seat and provided in the annular groove, and an elastic flexible ring provided between a first side wall of the annular groove and a second side wall of the annular protrusion; The arrangement direction of the first side wall, the flexible ring, and the second side wall is perpendicular to the first direction; the first connecting seat and the second connecting seat are cylindrical respectively, the first connecting seat and the second connecting seat are arranged along the axial direction, and the first connecting seat can be reciprocated in the radial direction relative to the second connecting seat and is arranged on the second connecting seat; the first side wall, the flexible ring, and the second side wall are abutted in sequence along the radial direction; When the first connection seat and the second connection seat are magnetically attracted to each other, the first connection seat can move relative to the second connection seat in a direction perpendicular to the first direction, and one side of the flexible ring is squeezed and deformed; When the first magnetic member is reset relative to the second magnetic member, the squeezed flexible ring is used to provide an elastic restoring force to eliminate the reset dead zone between the two.

2. A magnetically coupled bottom mold connection device according to claim 1, characterized in that: There are two groups of the annular groove, the annular protrusion, and the flexible ring. Two of the flexible rings are arranged at intervals perpendicular to the first direction. The first magnetic member and the second magnetic member are respectively arranged between the two flexible rings.

3. A magnetically coupled bottom mold connection device according to claim 2, characterized in that: The two flexible rings are arranged along the first direction, one of which is arranged on the outside of the first magnetic member or the second magnetic member, and the other of which is arranged on the inside of the second magnetic member or the first magnetic member.

4. A magnetically coupled bottom mold connection device according to claim 1, characterized in that: There are a plurality of first magnetic members, which are evenly spaced and arranged along the circumferential direction, and the centers of the plurality of first magnetic members are located on the center line of the flexible ring.

5. A magnetically coupled bottom mold connection device according to claim 1, characterized in that: The first magnetic component and the second magnetic component are arranged along the first direction, the first magnetic component is recessed in a side surface of the first connecting seat facing the second connecting seat, and the second magnetic component is recessed in a side surface of the second connecting seat facing the first connecting seat.

6. A magnetically coupled bottom mold connection device according to claim 1, characterized in that: The first magnetic member is connected to the first connection seat by bonding, nesting, or screw fixing, and the second magnetic member is connected to the second connection seat by bonding, nesting, or screw fixing.

7. A magnetically coupled bottom mold connection device according to claim 1, characterized in that: The first connecting seat is provided with a mounting sleeve for mounting the bottom mold.

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