A mold plate spacing adjustment device for a blow molding machine mold opening and closing mechanism

Abstract

The present invention discloses a template spacing adjustment device for a mold opening and closing mechanism of a blow molding machine, comprising a rod end joint, an adjustment rod, a rotating nut, and a connecting rod. The front end of the rod end joint is movably connected to the lower part of the front arm of the external mold opening and closing mechanism. The rod end joint is provided with an axial hole arranged along the axial direction for the adjustment rod to pass through. The tail end of the adjustment rod is connected and fixed with the rotating nut, and its front end protrudes out of the axial hole. The tail of the rotating nut is provided with an internal threaded hole. One end of the connecting rod is placed in the internal threaded hole and is threadedly connected and fixed with the tail of the rotating nut. The other end of the connecting rod is connected to one end of a driving rod at the lower part of the external mold opening and closing mechanism. The template spacing adjustment device for the mold opening and closing mechanism of a blow molding machine effectively achieves the purpose of adjusting the template spacing, has high adjustment accuracy, and is highly safe. It effectively eliminates the influence of deformation caused by temperature rise on the clamping force, and is therefore highly practical.

Description

Technical Field

[0001] The invention relates to a template spacing adjustment device of a mold opening and closing mechanism of a blow molding machine, and relates to the technical field of blow molding machinery. Background Art

[0002] Blow molding, also known as hollow blow molding, is a rapidly developing plastic processing method. The tubular plastic preform obtained by extrusion or injection molding of thermoplastic resin is placed in a split mold while hot (or heated to a softened state). After the mold is closed, compressed air is immediately introduced into the preform to inflate the plastic preform and make it adhere tightly to the inner wall of the mold. After cooling and demolding, various hollow products are obtained. A mold opening and closing mechanism is installed on the blow molding machine. Most of the current mold opening and closing mechanisms directly act on the movable mold frame through the oil cylinder, so that a pair of movable mold frames used to configure the mold are closed or repelled from each other. The authorization announcement number CN202200436 U discloses an elbow-type mold opening and closing mechanism, which changes the existing technology from directly installing the action cylinder on the movable mold frame to being located below the mold frame seat, thereby reducing the overall volume of the mold opening and closing mechanism and making the structure simpler. However, in this installation method, the adjustment process of the template spacing is relatively cumbersome, and the dynamic adjustment process is relatively dangerous, and the safety is not high. At present, there are still some mold opening and closing mechanisms in which the two elbow arms are connected to the rod end joints respectively, and a mold adjustment rod is connected between the two. The mold adjustment rod is fastened and fixed to the rod end joint with a round nut for adjusting the template spacing. However, similarly, such a structure does not have a design to eliminate the thread gap. At the same time, when adjusting, it is necessary to loosen the round nut first, and then rotate the mold adjustment rod. The adjustment process is cumbersome. At the same time, dynamic adjustment, that is, when the mechanism is running, is relatively dangerous, and the safety is also not high. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a template spacing adjustment device of a mold opening and closing mechanism of a blow molding machine which has a simple structure and can effectively and quickly adjust the template spacing.

[0004] In order to solve the above technical problems, the present invention is achieved through the following technical solutions:

[0005] A template spacing adjustment device for a blow molding machine's mold opening and closing mechanism comprises a rod end joint, an adjusting rod, a rotating nut, and a connecting rod. The front end of the rod end joint is movably connected to the lower part of a front arm of an external mold opening and closing mechanism. An axial hole is provided inside the rod end joint and is arranged axially for the adjusting rod to pass through. The tail end of the adjusting rod is connected and fixed to the rotating nut, and its front end protrudes out of the axial hole. An internal threaded hole is provided at the tail of the rotating nut. One end of the connecting rod is placed in the internal threaded hole and is threadedly connected and fixed to the tail of the rotating nut. The other end of the connecting rod is connected to one end of a driving rod at the lower part of the external mold opening and closing mechanism.

[0006] Preferably, the tail of the rod end joint is provided with a tail shaft hole whose diameter is larger than the shaft hole and coaxial with the shaft hole, and the head of the rotating nut is placed in the tail shaft hole and is connected and fixed to the tail end of the adjusting rod.

[0007] Preferably, the rotating nut includes a connecting head and a tail connecting rod connected to its tail end, the connecting head is placed in the tail shaft hole and is connected and fixed to the tail end of the adjusting rod, the diameter of the tail connecting rod is smaller than the diameter of the tail shaft hole, the tail thread is placed at the tail end of the tail connecting rod, and the head of the connecting rod is threadedly connected and fixed to the tail end of the tail connecting rod.

[0008] Preferably, the tail of the rod end joint is provided with a rotating nut end cover which is ring-shaped on the outside of the tail connecting rod, the diameter of the middle opening of the rotating end cover is smaller than the outer diameter of the connecting head, and the rotating nut end cover is screwed and fixed to the tail end of the rod end joint.

[0009] Preferably, the external thread of the connecting rod is sleeved with a fastening nut.

[0010] Preferably, the rod end joint is movably connected to the lower end of the front arm of the external opening and closing mold mechanism through a pin shaft, and the pin shaft is fixed in the pin hole at the lower end of the front arm through a bearing.

[0011] Preferably, a middle opening is provided in the middle of the pin shaft for the adjusting rod to pass through.

[0012] Preferably, the end of the adjusting rod is configured as an outer square head.

[0013] Compared with the prior art, the advantages of the present invention are as follows: the template spacing adjustment device of the opening and closing mold mechanism of the blow molding machine has a simple structure and is easy to install and manufacture. By setting a rotation adjustment method for advancing and retreating threads, the template spacing adjustment purpose is effectively achieved. The adjustment accuracy is high and the safety is high. The influence of deformation caused by temperature rise on the clamping force is effectively eliminated, and thus the practicability is high.

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required to be used in the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 It is an exploded view of the present invention when installed;

[0016] Figure 2 It is an axonometric view of the present invention when installed;

[0017] Figure 3 It is a side partial cross-sectional view of the present invention. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention:

[0019] like Figures 1 to 3 The template spacing adjustment device of the mold opening and closing mechanism of a blow molding machine is shown, wherein Figure 1 Only one side of the front arm 5 is shown. The device is installed below the mold opening and closing mechanism, and includes a rod end joint 1, an adjusting rod 2, a rotating nut 3, and a connecting rod 4. The front end of the rod end joint 1 is movably connected to the lower part of the front arm 5 of the external mold opening and closing mechanism. In actual application, in order to facilitate installation and facilitate the free rotation of the front arm 5 relative to the rod end joint 1, the rod end joint 1 is movably connected to the lower end of the front arm 5 of the external mold opening and closing mechanism through a pin 6. The pin 6 passes through the front end of the rod end joint 1 and the pin hole at the lower end of the front arm 5. Further, the pin 6 is fixed in the pin hole at the lower end of the front arm 5 through a bearing 7. The rod end joint 1 has an axial hole 8 arranged along the axial direction and for the adjusting rod 2 to pass through. The adjusting rod 2 can rotate relative to the rod end joint 1 in the axial hole. 8, the tail end of the adjusting rod 2 is connected and fixed with the rotating nut 3, and the front end thereof protrudes from the axial hole 8. The tail of the rotating nut 3 is provided with an internal threaded hole 9, and the depth of the internal threaded hole 9 can be selected according to needs. One end of the connecting rod 4 is placed in the internal threaded hole 9 and is connected and fixed with the tail of the rotating nut 3 by thread, and the other end of the connecting rod 4 is connected to one end of the driving rod 10 at the lower part of the external opening and closing mold mechanism. Therefore, by rotating the adjusting rod 2, the rotating nut 3 can be driven to rotate, while the connecting rod 4 does not rotate relative to the rotating thread, thereby realizing the process of advancing and retreating the thread of the connecting rod 4, thereby realizing the displacement of the overall rod end joint 1 relative to the rear driving rod 10, further realizing the movement of the front arm 5 of the opening and closing mold mechanism, and then realizing the adjustment process of the template spacing.

[0020] In this embodiment, in order to facilitate the connection between the rotating nut 3 and the adjusting rod 2 and to improve the stability of the operation of the overall connection structure, the tail of the rod end joint 1 is provided with a tail shaft hole 11 with a diameter larger than the shaft hole 8 and coaxial with the shaft hole 8, and the head of the rotating nut 3 is placed in the tail shaft hole 11 and connected and fixed to the tail end of the adjusting rod 2. Further, in order to facilitate the connection between the rotating nut 3 and the adjusting rod 2 and the connecting rod 4 respectively, the rotating nut 3 includes a connecting head 301 and a tail connecting rod 302 connected to its tail end, the connecting head 301 is placed in the tail shaft hole 11 and connected and fixed to the tail end of the adjusting rod 2, the diameter of the tail connecting rod 302 is smaller than the diameter of the tail shaft hole 11, the tail thread is placed at the tail end of the tail connecting rod 302, and the head of the connecting rod 4 is threadedly connected and fixed to the tail end of the tail connecting rod 302.

[0021] In this embodiment, in order to improve the stability of the head of the rotating nut 3 placed in the tail shaft hole 11, the tail of the rod end joint 1 is provided with a rotating nut end cover 12 which is ring-shaped on the outside of the tail connecting rod 302. The diameter of the middle opening of the rotating nut end cover 12 is smaller than the outer diameter of the connecting head 301. The rotating nut end cover 12 is connected and fixed with the tail end screw of the rod end joint 1. The head of the rotating nut 3 is clamped in the tail shaft hole 11 through the rotating nut end cover 12 to prevent it from slipping out, thereby improving the stability of the overall structure.

[0022] In addition, the external thread of the connecting rod 4 is sleeved with a fastening nut 13, and the threads of the connecting rod 4 and the rotating nut 3 can be effectively tightened by the fastening nut 13 to avoid the influence of the thread gap on the operation of the opening and closing mold mechanism.

[0023] In this embodiment, in order to facilitate the installation and adjustment of the adjusting rod 2, a central opening 14 is opened in the middle of the pin shaft 6 for the adjusting rod 2 to pass through, and the end of the adjusting rod 2 is set as an outer four-corner head. By rotating the outer four-corner head with a wrench, the adjustment process can be conveniently and quickly implemented.

[0024] When the nut 3 is rotated, the rear end of the nut 3 is connected to the end of the connecting rod 4, and the connecting rod 4 itself is connected to the driving rod 10, and the driving rod 10 is a non-rotating rod body. Therefore, when the nut 3 is rotated, the connecting rod 4 does not move. Since the rear end of the nut 3 is threadedly connected to the connecting rod 4, the thread advance and retreat of the connecting rod 4 is realized, and then the movement of the rod end joint 1 and the front arm 5 is realized, and then the template spacing adjustment purpose is achieved. The template spacing adjustment device of the opening and closing mechanism of the blow molding machine has a simple structure and is easy to install and manufacture. By setting the rotation adjustment method of the thread advance and retreat, the template spacing adjustment purpose is effectively achieved. The adjustment accuracy is high and the safety is high. The influence of the deformation caused by the temperature rise on the clamping force is effectively eliminated, and thus the practicability is high.

[0025] It should be emphasized that the above are only preferred embodiments of the present invention and do not limit the present invention in any form. Any simple modifications, equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A template spacing adjustment device for a mold opening and closing mechanism of a blow molding machine, characterized in that: The swivel nut is an adjustable nut and a connecting rod, wherein the front end of the swivel nut is movably connected to the lower part of the front arm of the external mold opening and closing mechanism, the inside of the swivel joint is provided with an axial hole arranged axially for the adjusting rod to pass through, the tail end of the adjusting rod is connected and fixed with the rotating nut, and the front end thereof protrudes out of the axial hole, the tail part of the rotating nut is provided with an internal threaded hole, one end of the connecting rod is placed in the internal threaded hole and is threadedly connected and fixed with the tail part of the rotating nut, the external thread of the connecting rod is sleeved with a fastening nut for tightening the threads of the connecting rod and the rotating nut, the other end of the connecting rod is connected with one end of a driving rod at the lower part of the external mold opening and closing mechanism, the tail part of the swivel joint is provided with a tail axial hole whose diameter is larger than the axial hole and is coaxial with the axial hole, the head of the rotating nut is placed in the tail axial hole and is connected and fixed with the tail end of the adjusting rod, the swivel nut is movably connected with the lower end of the front arm of the external mold opening and closing mechanism through a pin shaft, and the pin shaft is fixed in the pin hole at the lower end of the front arm through a bearing.

2. The template spacing adjustment device of the mold opening and closing mechanism of a blow molding machine according to claim 1, characterized in that: The rotating nut includes a connecting head and a tail connecting rod connected to its tail end, the connecting head is placed in the tail shaft hole and is connected and fixed to the tail end of the adjusting rod, the diameter of the tail connecting rod is smaller than the diameter of the tail shaft hole, the tail thread is placed at the tail end of the tail connecting rod, and the head of the connecting rod is threadedly connected and fixed to the tail end of the tail connecting rod.

3. The template spacing adjustment device of the mold opening and closing mechanism of a blow molding machine according to claim 2, characterized in that: The tail of the rod end joint is provided with a rotating nut end cover which is ring-covered on the outside of the tail connecting rod. The diameter of the middle opening of the rotating nut end cover is smaller than the outer diameter of the connecting head. The rotating nut end cover is screw-connected and fixed to the tail end of the rod end joint.

4. The template spacing adjustment device of the mold opening and closing mechanism of a blow molding machine according to claim 1, characterized in that: The middle part of the pin shaft is provided with a middle opening for the adjusting rod to pass through.

5. The template spacing adjustment device of the mold opening and closing mechanism of a blow molding machine according to claim 1, characterized in that: The end of the adjusting rod is in the shape of an outer four-cornered head.

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