Bottom die locking rod device of blow molding mechanism

Abstract

The utility model relates to a lock rod device, and particularly discloses a bottom die lock rod device of a blow molding mechanism, which comprises a bottom die support, a lock rod and a lock hole piece, the lock rod transversely penetrates through the cylindrical top end of the bottom die support, two ends of the lock rod extend out of the cylindrical side surface of the bottom die support, and the lock rod is arranged corresponding to a lock hole arranged at the lower end of the lock hole piece; the overlapped part of the lock rod and the bottom die bracket is a connecting part, two ends of the lock rod extending out of the cylindrical side surface of the bottom die bracket are rotating parts, the connecting part and the rotating parts are integrally designed, and the diameter of the connecting part is larger than that of the rotating parts in order to improve the anti-shearing strength of the connecting part. The bottom die fixing device is simple in structure, high in shear strength, long in service life and suitable for fixing a bottom die in a blow molding mechanism on a bottle blowing machine.

Description

Technical Field

[0001] The utility model relates to a locking rod device, in particular to a bottom mold locking rod device of a blow molding mechanism. Background Art

[0002] The blow molding machine in a Krones automated production line is used to blow-blow plastic bottles. It consists of three main components: a preform sorting unit, a preform heating and drying oven, and a blow molding machine. The preform sorting unit melts and extrudes plastic granules into preforms, while the preform heating and drying oven preheats the preforms. The blow molding unit in the blow molding machine then uses advanced blow molding technology to shape the preforms into bottles. The entire production process utilizes an automated control system, enabling efficient and continuous production. This machine has wide applications in the food, beverage, and pharmaceutical industries.

[0003] During the blow molding process, the bottom mold rises after the preform enters the blow molding station, and the entire blow molding mold is closed and locked. With the help of the neck ring, the preform is fixed in the blow molding mold, and the blow molding is completed. However, there are still some problems in the actual production of Krones blow molding machines: the upper end of the bottom mold bracket is equipped with a locking rod structure that can lock the bottom mold, such as Figure 1 As shown, the original locking rod 5 in the prior art consists of two parts connected by threads. When the bottom mold rises, the locking rod 5 enters the corresponding locking hole to complete the locking of the bottom mold. However, during production, the bottle blowing machine is in a high-speed rotation state, which causes the locking rod to vibrate in the locking hole. The locking rod is subjected to excessive shear force and breaks at the threaded connection with a smaller diameter. The broken locking rod cannot rotate in the locking hole to complete the locking of the bottom mold, and the entire mold cannot be closed, resulting in production failure and equipment shutdown. Utility Model Content

[0004] In order to solve the above problems existing in the prior art, the utility model aims to provide a bottom mold locking rod of a blow molding mechanism to solve the problem that the mold cannot be closed due to a broken locking rod, so as to achieve the purpose of reducing the failure rate of the equipment.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows: a bottom mold locking rod device of a blow molding mechanism, including a bottom mold bracket, a locking rod, and a locking hole piece. The locking rod horizontally passes through the cylindrical top of the bottom mold bracket. The locking rod is cylindrical, and both ends of the locking rod extend out of the cylindrical side of the bottom mold bracket. The two ends of the locking rod are corresponding to the locking holes opened at the lower end of the locking hole piece. The part where the locking rod and the bottom mold bracket overlap is the connecting part, and the two ends of the locking rod extending out of the cylindrical side of the bottom mold bracket are the rotating parts. The connecting part and the rotating part are designed as an integrated whole.

[0006] As a limitation of the present invention: a positioning bolt is fixed between the bottom mold bracket and the locking rod, and the positioning bolt passes through the bottom mold bracket and the locking rod connection part.

[0007] As a limitation of the present invention: the positioning bolt is vertically arranged, and the positioning bolt passes through the top surface of the bottom mold bracket and the locking rod connecting part from top to bottom in sequence.

[0008] As a limitation of the present invention: the diameter of the connecting portion is greater than the diameter of the rotating portion.

[0009] As a limitation of the present invention, the diameter of the connecting portion is 5 mm to 9 mm.

[0010] Due to the adoption of the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0011] (1) The connecting portion and the rotating portion of the lock rod of the utility model are designed as an integrated whole, so that there is no weak point on the lock rod, which solves the problem of the lock rod breaking due to excessive shear force generated by vibration between the lock rod and the lock hole during high-speed rotation of the bottle blowing machine;

[0012] (2) The diameter of the connecting part of the utility model is larger than the diameter of the rotating part, which further strengthens the strength of the lock rod structure, that is, the shear strength is improved. Through finite element analysis, it is known that when the diameter of the connecting part is 7mm, the shear strength of the lock rod is increased from the original 4150N to 7500N, and the corresponding safety factor S is increased from 2.8 of the original structure to 5.5. The service life of the lock rod is longer, and the failure rate of the mold being unable to close due to the breakage of the lock rod is reduced to zero;

[0013] (3) The present invention is also provided with a positioning bolt for fixing the lock rod and the bottom mold bracket, which changes the installation method of the lock rod from a through-type to a through-fixed type, further improving the stability of the lock rod during the rotation of the mechanism.

[0014] In summary, the utility model has a simple structure, and the locking rod is set to be integrated on the basis of the original blow molding mechanism, which has low improvement cost, simple structure, and strong practicality. It is suitable for fixing the bottom mold in the blow molding mechanism of the bottle blowing machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0016] Figure 1 This is a front view of the original locking rod of the existing equipment;

[0017] Figure 2 This is a schematic diagram of the three-dimensional structure of an embodiment of the utility model;

[0018] Figure 3 This is a front view of the locking rod in the embodiment of the utility model;

[0019] In the figure: 1- bottom mold support, 2- locking rod, 21- connecting part, 22 rotating part, 3- locking hole piece, 31- locking hole, 4- positioning bolt, 5- original locking rod. DETAILED DESCRIPTION

[0020] The preferred embodiment of the present invention will be described below with reference to the accompanying drawings. It should be understood that the bottom mold locking rod device of the blow molding mechanism described herein is a preferred embodiment and is only used to illustrate and explain the present invention, and does not constitute a limitation of the present invention. Example

[0021] This embodiment Figures 2-3 As shown in FIG, a bottom mold locking rod device of a blow molding mechanism includes a bottom mold support 1, a locking rod 2, and a locking hole member 3. Figure 2 As shown in the figure, the upper part of the bottom mold bracket 1 is a vertical cylinder, and the lower part of the bottom mold bracket 1 is connected to the bottom mold mechanism (not shown in the figure). A locking rod 2 is provided through the top part of the bottom mold bracket 1, and both ends of the locking rod 2 extend out of the cylindrical side of the bottom mold bracket 1. When the bottom mold bracket 1 moves upward, it drives the locking rod 2 to enter the locking hole 31 opened at the lower end of the locking hole part 3, and the locking hole part 3 rotates to lock it to complete the closing and fixation of the mold.

[0022] Figure 1 The figure in the middle shows the original locking rod 5 structure used in the existing equipment. The original locking rod 5 is divided into two parts, which are connected together by threads. During the high-speed rotation of the bottle blowing machine, the original locking rod 5 will vibrate in the lock hole 31. The original locking rod 5 is subjected to vertical shear force, causing it to break at the thread. Figure 3 The figure shows a locking rod structure in this embodiment. The locking rod 2 is composed of coaxial cylinders of different diameters and is an integrated design. The portion where the locking rod 2 overlaps with the bottom mold support 1 is the connecting portion 21. The two ends of the locking rod 2 extending from the cylindrical side of the bottom mold support 1 are the rotating portions 22. The connecting portion 21 and the rotating portion 22 are an integrated design. In order to strengthen the strength of the locking rod structure, the diameter of the connecting portion 21 is designed to be larger than the diameter of the rotating portion 22. The diameter of the connecting portion 21 is 5 to 9 mm, and the diameter of the rotating portion 22 is 5 to 9 mm. Figure 1 The diameter of the central locking rod 5 is the same as 4mm, so that the utility model can be adapted to other components of the original blow molding mechanism. Preferably, the diameter of the connecting portion 21 is set to 7mm. When the diameter of the connecting portion 21 is 7mm, Figure 1 Compared with the original locking rod 5 structure in the embodiment, the shear force analysis was performed on the two, and the results are as follows: the original locking rod 5 adopts M4 bolts, and its shear strength is calculated to be about 4150N according to the relevant provisions of the mechanical engineering manual, and the bolt yield safety factor S is 2.8. The shear strength of the locking rod structure of this embodiment is about 7500N, and the bolt yield safety factor S is 5.5. It can be seen that the shear strength of the locking rod 2 of this embodiment is significantly improved.

[0023] like Figure 2As shown, the positioning bolt 4 is vertically arranged, passing through the top surface of the bottom mold support 1 and the connecting portion 21 of the lock rod 2 from top to bottom. The installation method of the lock rod 2 has been changed from the original through-type to a through-fixed type. Of course, the positioning bolt 4 can also be arranged horizontally to pass through the bottom mold support 1 and the connecting portion 21. The positioning bolt 4 can make the lock rod 2 structure more stable.

[0024] When using this embodiment, the original locking rod 5 is replaced with the locking rod 2 of this embodiment and fixed by the positioning bolt 4. When the bottom mold bracket 1 drives the mold bottom mold to rise, the locking rod 2 also rises into the locking hole 31. The locking hole part 3 rotates to fix the position of the locking rod 2, thereby completing the fixation of the bottom mold and making the mold completely closed.

Claims

1. A bottom mold locking rod device for a blow molding mechanism, comprising a bottom mold support, a locking rod, and a locking hole member, wherein the locking rod extends transversely through the cylindrical top of the bottom mold support, is cylindrical, and both ends of the locking rod extend out of the cylindrical side of the bottom mold support, and the ends of the locking rod are arranged corresponding to the locking holes provided at the lower end of the locking hole member, characterized in that: The portion where the locking rod overlaps with the bottom mold bracket is the connecting portion, and the two ends of the locking rod extending out of the cylindrical side of the bottom mold bracket are rotating portions. The connecting portion and the rotating portion are of an integrated design.

2. The bottom mold locking rod device of the blow molding mechanism according to claim 1, characterized in that: A positioning bolt is fixed between the bottom mold bracket and the locking rod, and the positioning bolt passes through the bottom mold bracket and the locking rod connecting portion.

3. The bottom mold locking rod device of the blow molding mechanism according to claim 2, characterized in that: The positioning bolts are arranged vertically, and pass through the top surface of the bottom mold bracket and the locking rod connecting part in sequence from top to bottom.

4. The bottom mold locking rod device of the blow molding mechanism according to any one of claims 1 to 3, characterized in that: The diameter of the connecting portion is larger than the diameter of the rotating portion.

5. The bottom mold locking rod device of the blow molding mechanism according to claim 4, characterized in that: The diameter of the connecting portion is 5 mm to 9 mm.

Images