阅读说明：本技术 一种弹子式瓶坯装载头 (Bullet formula bottle base loading head ) 是由 刘滨 于 2019-10-28 设计创作，主要内容包括：本发明公开一种弹子式瓶坯装载头,包括一端面设有螺孔的内芯轴、在内芯轴同轴套设的外芯轴、弹子导引套、波形弹簧、下弹子环、锥套、垫圈和螺钉以及弹子；弹子导引套为台阶轴包括有中心通孔的主体、第一过渡段、直径段和第二过渡段,主体止于第二过渡段；中心通孔内周面与内芯轴外周面形成运动副；锥套侧面和第二过渡段相对；外芯轴位于弹子导引套侧的部分形成与下弹子环相反的上弹子环；弹子位于由锥套、弹子导引套、下弹子环和上弹子环围成的空间内；波形弹簧套在两弹子环间的弹子导引套上；露出通孔的弹子最大凸出点距弹子环外表面的距离≤0.75mm。本发明具有准确均匀装载的优点。(The invention discloses a bullet type bottle blank loading head which comprises an inner mandrel, an outer mandrel, a bullet guide sleeve, a wave spring, a lower bullet ring, a taper sleeve, a gasket, a screw and a bullet, wherein the end face of the inner mandrel is provided with a screw hole; the marble guide sleeve is a step shaft and comprises a main body with a central through hole, a first transition section, a diameter section and a second transition section, and the main body is stopped at the second transition section; the inner peripheral surface of the central through hole and the outer peripheral surface of the inner core shaft form a kinematic pair; the side surface of the taper sleeve is opposite to the second transition section; the part of the outer mandrel, which is positioned on the side of the marble guide sleeve, forms an upper marble ring opposite to the lower marble ring; the marble is positioned in a space enclosed by the taper sleeve, the marble guide sleeve, the lower marble ring and the upper marble ring; the wave spring is sleeved on the marble guide sleeve between the two marble rings; the distance between the maximum protruding point of the marble exposed out of the through hole and the outer surface of the marble ring is less than or equal to 0.75 mm. The invention has the advantage of accurate and uniform loading.)

1. A bullet type bottle blank loading head is characterized by comprising an inner mandrel, an outer mandrel, a bullet guide sleeve, a wave spring, a lower bullet ring, a taper sleeve, a gasket, a screw and a bullet, wherein the end face of the inner mandrel is provided with a screw hole;

the marble guide sleeve is a step shaft and comprises a main body with a central through hole, a first conical transition section, a diameter section and a second conical transition section which are sequentially arranged on the main body, and the main body is stopped at the second conical transition section; the inner peripheral surface of the central through hole and the outer peripheral surface of the inner core shaft form a kinematic pair in the up-down direction;

the conical side surface of the taper sleeve is opposite to the second conical transition section;

an annular flat-bottom groove is formed on the inner ring surface of the lower marble ring along the annular direction, two groove walls of the groove form splayed inclined walls, the distance from the top end of the upward inclined wall to the groove bottom is greater than the distance from the bottom end of the downward inclined wall to the groove bottom, a bulge is formed at the top of the upward inclined wall and faces the axis of the ring to serve as a check ring, and a plurality of through holes for marbles to be exposed out of the ring are uniformly formed in the groove bottom;

the inner side part of the lower end of the outer mandrel and the inner mandrel are coaxially provided with a cylindrical groove for inserting the step shaft main body, the outer side part forms a positioning surface vertical to the axis, the middle part protrudes out of the positioning surface to form an upper marble ring which has the same structural shape with the lower marble ring after being turned up and down, and the top end of the upper inclined wall of the upper marble ring faces the step shaft main body to form a conical side surface which is in the same direction as the conical side surface of the second conical transition section and is used as the conical side surface of the outer mandrel;

the marble is positioned in a space enclosed by the taper sleeve, the marble guide sleeve and the lower marble ring, and a space enclosed by the tapered side surface of the outer mandrel, the marble guide sleeve and the upper marble ring;

the wave spring is positioned between the upper marble ring and the lower marble ring and sleeved on the marble guide sleeve.

2. The pellet loading head as claimed in claim 1, wherein the distance from the maximum protruding point of the pellet exposed from the through hole to the outer surface of the pellet ring is not more than 0.75 mm.

Technical Field

The invention belongs to the technical field of bottle blowing machines, and particularly relates to a pin tumbler type bottle blank loading head.

Background

The bottle blowing production process flow of the beverage bottle generally comprises the following steps: blank arrangement, blank loading and heating → blank unloading, mold → mechanical stretching and pre-blowing → bottle blowing and other five main steps. In the process of loading and heating the bottle preform, the bottle preform loading head is one of the important parts that can be smoothly realized. The bottle blank loading head loads the bottle blanks onto the bottle blank loading head under the mechanical action of the outer core shaft lever and the inner core shaft lever, and the bottle blanks enter the heating furnace. When the bottle blank passes through the heating area, the bottle blank is heated to 90-115 ℃, unloaded after the heating time is about 20 seconds, and then sent into a bottle blowing mold cavity for bottle blowing.

The clamping method of the loading head includes an external clamping method and an internal clamping method, for example, in patent document CN203267195U, an external clamping type loading head is adopted, but the clamping method is not adopted in the industry at present. An inner clamping method is generally used in the industry, and for example, patent document CN204123668U discloses a spring + spring sheet type of the inner clamping method, and patent document CN208324180U discloses an O-ring + spring sheet type of the inner clamping method.

The loading head adopting the internal clamping mode has the following problems in work:

1) the elasticity and rigidity of the spring are reduced due to long-time heating;

2) the problem of rubber aging and short service life caused by long-time heating of the O-shaped ring;

3) the tensioning force of the spring or the O-shaped ring acting on the movable elastic sheet is uneven and the coaxiality is poor.

Disclosure of Invention

In order to solve the existing problems, the invention provides a bullet type bottle blank loading head.

The invention relates to a bullet type bottle blank loading head which comprises an inner mandrel, an outer mandrel, a bullet guide sleeve, a wave spring, a lower bullet ring, a taper sleeve, a gasket, a screw and a bullet, wherein the end face of the inner mandrel is provided with a screw hole;

the marble guide sleeve is a step shaft and comprises a main body with a central through hole, a first conical transition section, a diameter section and a second conical transition section which are sequentially arranged on the main body, and the main body is stopped at the second conical transition section; the inner peripheral surface of the central through hole and the outer peripheral surface of the inner core shaft form a kinematic pair in the up-down direction;

the conical side surface of the taper sleeve is opposite to the second conical transition section;

an annular flat-bottom groove is formed on the inner ring surface of the lower marble ring along the annular direction, two groove walls of the groove form splayed inclined walls, the distance from the top end of the upward inclined wall to the groove bottom is greater than the distance from the bottom end of the downward inclined wall to the groove bottom, a bulge is formed at the top of the upward inclined wall and faces the axis of the ring to serve as a check ring, and a plurality of through holes for marbles to be exposed out of the ring are uniformly formed in the groove bottom;

the inner side part of the lower end of the outer mandrel and the inner mandrel are coaxially provided with a cylindrical groove for inserting the step shaft main body, the outer side part forms a positioning surface vertical to the axis, the middle part protrudes out of the positioning surface to form an upper marble ring which has the same structural shape with the lower marble ring after being turned up and down, and the top end of the upper inclined wall of the upper marble ring faces the step shaft main body to form a conical side surface which is in the same direction as the conical side surface of the second conical transition section and is used as the conical side surface of the outer mandrel;

the marble is positioned in a space enclosed by the taper sleeve, the marble guide sleeve and the lower marble ring, and a space enclosed by the tapered side surface of the outer mandrel, the marble guide sleeve and the upper marble ring;

the wave spring is positioned between the upper marble ring and the lower marble ring and sleeved on the marble guide sleeve.

When the inner mandrel is pulled upwards relative to the central through hole, the marble is clamped by the lower marble ring and the taper sleeve, the marble is clamped by the upper marble ring and the tapered side surface of the outer mandrel, and the marble is exposed out of the ring; when the inner mandrel descends relative to the central through hole in the axial direction, the lower marble ring, the second conical transition section and the taper sleeve clamp the marbles, the upper marble ring, the first conical transition section and the conical side face of the outer mandrel clamp the marbles, and the marbles are located in the rings.

In order to effectively perform tensioning, the distance between the maximum protruding point of the marble exposed out of the through hole and the outer surface of the marble ring is less than or equal to 0.75 mm.

Has the advantages that: according to the invention, a spring + spring piece type, an O-shaped ring and a spring piece type are replaced by a spring type tensioning mode in the prior art, the balls uniformly distributed in the upper and lower layers of spring rings directly contact the inner hole of the bottle blank, the stress of the inner hole of the bottle blank is consistent and uniform, and the coaxiality of the clamped bottle blank and a loading head is consistent, so that the tensioning degree of the loaded bottle blank is fixed and firm, the bottle blank is stable during rotation, cannot incline or shake, and the bottle blank loading and unloading actions are accurate; the distance between the maximum protruding point of the marble exposed out of the through hole and the outer surface of the marble ring is less than or equal to 0.75mm, so that effective tensioning can be performed.

Drawings

Fig. 1 is a schematic structural view of a pellet type bottle blank loading head according to an embodiment of the present invention;

fig. 2 is a schematic view showing the structure of the expansion of the pellet loading head of fig. 1;

FIG. 3 is a schematic structural view of a pin tumbler guiding sleeve;

FIG. 4 is a schematic longitudinal cross-sectional view of the lower projectile ring;

FIG. 5 is a schematic longitudinal cross-sectional view of a pellet loading head according to an embodiment of the present invention;

FIG. 6 is a schematic view of the loading head entering the preform as the inner mandrel and the outer mandrel are simultaneously lowered;

FIG. 7 is a schematic view of the inner mandrel being lifted and tightened to clamp the bottle preform;

FIG. 8 is a schematic view of the inner mandrel being lowered to release the preform;

FIG. 9 is a schematic view of the carrier head disengaged from the preform after the inner mandrel and the outer mandrel are simultaneously lifted;

FIG. 10 is a view of the loading head in position in the preform plug assembly;

1. an outer mandrel; 11. a cylindrical recess; 12. positioning the surface; 2. an inner mandrel; 3. marbles; 4. a marble guide sleeve; 41. a main body; 42. a first tapered transition section; 43. a diameter section; 44. a second conical transition section; 45. a central through hole; 5. a lower projectile ring; 6. a taper sleeve; 7. a gasket; 8. a screw; 9. a wave spring; 10. and (4) mounting a bullet ring.

Detailed Description

The technical solution of the present invention is described in detail by the following examples, but the scope of the present invention is not limited to the examples.