A PET bottle preform injection molding device

Abstract

The utility model belongs to PET bottle blank production technical field, and disclose a kind of PET bottle blank injection molding device, including PET bottle injection mould, the right side of PET bottle injection mould is provided with connecting assembly, connecting assembly includes injection shell, the surface of injection shell and PET bottle injection mould is connected with pedestal, and the inside of two groups of pedestal is penetrated with connecting rod, and the outside of connecting rod is connected with locking pin;The inside of injection shell is provided with annular groove, and the inside of annular groove is fixedly connected with baffle, the surface of baffle is fixedly connected with spring, the surface of spring is fixedly connected with snap ring, push plate is sleeved on the outside of snap ring, and snap ring and push plate are respectively provided with spherical groove and movable slot, and spherical groove and movable slot overlap slidingly have ball, by the above scheme, in the process of making different shapes of bottle blank, different types of mould need to be placed and changed, in the process of changing mould, the problem of long time.

Description

Technical Field

[0001] This utility model belongs to the field of PET preform production technology, specifically a PET preform injection molding device. Background Technology

[0002] PET preforms are semi-finished products used to produce PET plastic bottles. Granular PET is heated and melted by a PET preform injection molding machine, injected into the mold cavity, and cooled and shaped to obtain the preform. The preform is heated to a semi-molten state and placed into a blow molding mold, where it is inflated into the final bottle shape by compressed air. After cooling, it is demolded. During the injection molding process, different types of molds are required because the shapes of the PET preforms to be injected are inconsistent.

[0003] Meanwhile, patent application number 201921217827.2 discloses a PET preform injection molding device, including a base plate, with support plates fixedly installed on both sides of the upper surface of the base plate, and a top plate fixedly installed on the upper part of the two support plates. An electric telescopic rod is fixedly installed in the middle of the lower bottom surface of the injection box, and a moving mold is fixedly installed at the lower end of the electric telescopic rod. A fixed plate is fixedly installed on the lower part of one side opposite to the two support plates, and a fixed mold is fixedly installed in the middle of the upper surface of the fixed plate. A cooling mechanism is fixedly installed below the fixed mold.

[0004] However, in implementing the relevant technology, it was found that the above-mentioned PET preform injection molding device has the problem of requiring different types of molds to be placed and changed during the production of preforms of different shapes, and the mold changing process takes a long time. Utility Model Content

[0005] To address the problems mentioned in the background art, this utility model provides a PET preform injection molding device, which has the advantages of shortening mold change time and increasing work efficiency by adopting a quick-release structure.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a PET preform injection molding device, comprising a PET bottle injection mold, wherein the PET bottle injection mold has an internal cavity, and a connecting component is provided on the right side of the PET bottle injection mold. The connecting component includes an injection shell, and bases are connected to the surfaces of the injection shell and the PET bottle injection mold. Connecting rods penetrate the interiors of the two sets of bases, and locking pins are threaded onto the outer side of the connecting rods.

[0007] The injection shell has an annular groove inside, a partition is fixedly connected inside the annular groove, a spring is fixedly connected to the surface of the partition, a locking ring is fixedly connected to the surface of the spring, a push plate is sleeved on the outside of the locking ring, the locking ring and the push plate have a spherical groove and a movable groove respectively, and a pressing ball slides at the overlapping part of the spherical groove and the movable groove.

[0008] Preferably, the locking ring is slidably connected to an injection gun head, and a limiting groove is formed on the surface of the injection gun head, and the clamping ball slides inside the limiting groove.

[0009] Preferably, the pusher plate slides on the inner wall of the injection shell, and the protruding part of the pusher plate surface abuts against the groove on the right side of the injection shell opening.

[0010] Preferably, the pusher plate slides on the inner wall of the injection shell, and the protruding part of the pusher plate surface abuts against the groove on the right side of the injection shell opening.

[0011] Preferably, the PET bottle injection mold has a fluid chamber inside, which is connected to the guide rod.

[0012] Preferably, the surface of the PET bottle injection mold is provided with heat dissipation grooves, and the left side of the PET bottle injection mold is provided with a threaded groove.

[0013] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0014] 1. This utility model features a detachable structure for the PET bottle injection mold and the injection shell. The PET bottle injection mold can be replaced according to different preforms required for different manufacturing needs. The PET bottle injection mold and the injection shell are connected by a connecting rod running through their respective surface bases and locked together with a locking pin, thus achieving the connection between the PET bottle injection mold and the injection shell. Then, the injection gun head is slid towards the guide rod inside the PET bottle injection mold to lock the injection gun head and the guide rod. Injection is then performed through the injection gun head into the PET bottle injection mold. Heat dissipation grooves are formed on the surface of the PET bottle injection mold to dissipate the high temperature generated during injection, reducing cooling time. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the connecting component structure of this utility model;

[0017] Figure 3 This is a cross-sectional view of the PET bottle injection mold of this utility model.

[0018] Figure 4 This is a schematic diagram of the structure of the present invention, showing the separation of the locking ring from the injection gun head;

[0019] Figure 5 This is a schematic diagram of the connection between the locking ring and the injection gun head of this utility model.

[0020] In the diagram: 1. PET bottle injection mold; 2. Cavity; 21. Fluid chamber; 3. Connecting assembly; 31. Injection shell; 311. Annular groove; 32. Partition plate; 33. Spring; 34. Engaging ring; 341. Spherical groove; 35. Push plate; 351. Movable groove; 36. Anchor ball; 4. Base; 5. Connecting rod; 6. Locking pin; 7. Injection gun head; 71. Limiting groove; 8. Guide rod. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] like Figures 1 to 5 As shown, this utility model provides a PET preform injection molding device, including a PET bottle injection mold 1, the inside of the PET bottle injection mold 1 is provided with a cavity 2, a connecting component 3 is provided on the right side of the PET bottle injection mold 1, the connecting component 3 includes an injection shell 31, the injection shell 31 and the surface of the PET bottle injection mold 1 are both connected to a base 4, a connecting rod 5 passes through the inside of the two sets of bases 4, and a locking pin 6 is threaded to the outside of the connecting rod 5;

[0023] An annular groove 311 is provided inside the injection shell 31. A partition 32 is placed inside the annular groove 311. A spring 33 is fixedly connected to the surface of the partition 32. When the spring 33 is compressed, the reaction force of the spring 33 pushes the push plate 35 on the surface of the locking ring 34 to slide in the opposite direction. A spherical groove 341 and a movable groove 351 are provided on the locking ring 34 and the push plate 35, respectively. A pressing ball 36 slides at the overlap of the spherical groove 341 and the movable groove 351.

[0024] Specifically, the internal sliding connection of the locking ring 34 is an injection gun head 7, and the surface of the injection gun head 7 is provided with a limiting groove 71. The clamping ball 36 slides inside the limiting groove 71 to lock the injection gun head 7 inside the locking ring 34.

[0025] Furthermore, the internal sliding connection of the locking ring 34 is an injection gun head 7, and the surface of the injection gun head 7 is provided with a limiting groove 71, and the clamping ball 36 slides inside the limiting groove 71.

[0026] Furthermore, a guide rod 8 is slidably connected to the left side of the injection gun head 7. The guide rod 8 passes through the surface of the PET bottle injection mold 1 and is used to evenly distribute the molten PET material from the injection unit into each cavity. After cooling and solidification, a preform is obtained.

[0027] It is worth noting that the PET bottle injection mold 1 has a fluid chamber 21 inside, which is connected to the guide rod 8.

[0028] It is worth noting that the surface of the PET bottle injection mold 1 is provided with heat dissipation grooves. During the injection process, the temperature inside the PET bottle injection mold 1 will rise, increasing the heat dissipation area and reducing the demolding time. The left side of the PET bottle injection mold 1 is provided with a threaded groove to fit the bottle cap. The thread precision must meet the subsequent cap tightening and sealing requirements.

[0029] The structure, including the electric motor, is existing technology and will not be described further. Additionally, this utility model also includes a power supply, controller, and switch, which are not the main technical points of this patent and will not be described further. The "front, rear, left, and right" views of this device are... Figure 1 The direction shown in the diagram is the reference.

[0030] Working principle:

[0031] When it is necessary to injection mold a PET preform of a specific size, locate the PET bottle injection mold 1 that needs to be used, fit the PET bottle injection mold 1 and the injection shell 31 together, insert the connecting rod 5 into the base 4 that is fixed on the surface of the PET bottle injection mold 1 and the injection shell 31, and lock it with the locking pin 6 to fix the PET bottle injection mold 1 and the injection shell 31.

[0032] Next, when injection is needed into the fluid chamber 21 on the inner wall of the PET bottle injection mold 1, first hold the push plate 35 and slide it towards the PET bottle injection mold 1. During the sliding process, the push plate 35 contacts the spring 33 and deforms towards the partition plate 32, pushing the push plate 35 until the movable groove 351 on the surface of the push plate 35 coincides with the ball groove 341 on the surface of the retaining ring 34. When the two coincide, the retaining ball 36, under the action of gravity, presses against the retaining ball 34. 6 slides into the movable groove 351 on the surface of the push plate 35. At this time, the abutting ball 36 is located in the movable groove 351 on the surface of the push plate 35. Since there is no obstruction from the abutting ball 36, the inside of the locking ring 34 slides the injection gun head 7 into the locking ring 34. When the discharge port on the left side of the injection gun head 7 is connected to the feed port of the guide rod 8, the limiting groove 71 on the surface of the injection gun head 7 is at the same horizontal line as the locking pin 6 in the ball groove 341 and the movable groove 351.

[0033] After the connection is fixed, the push plate 35 is released. The push plate 35 is pushed to the right by the partition plate 32 in the annular groove 311. During the sliding process, the abutting ball 36 slides along the slope of the movable groove 351 to the position of the movable groove 351 and the limiting groove 71, and is used to limit the distance between the injection gun head 7 and the retaining ring 34. The liquid from the injection gun head 7 flows through the guide rod 8 to the position of the fluid chamber 21 inside the PET bottle injection mold 1. When cooling is performed, the preform is removed. When it is necessary to inject PET preforms of other sizes, the current size PET preform needs to be removed and the other size PET preform is installed.

[0034] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A PET preform injection molding apparatus, comprising a PET bottle injection mold (1), characterized in that: The PET bottle injection mold (1) has an internal cavity (2), and a connecting component (3) is provided on the right side of the PET bottle injection mold (1). The connecting component (3) includes an injection shell (31). The injection shell (31) and the surface of the PET bottle injection mold (1) are both connected to a base (4). A connecting rod (5) passes through the interior of the two sets of bases (4). A locking pin (6) is threaded on the outside of the connecting rod (5). The injection shell (31) has an annular groove (311) inside. A partition (32) is fixedly connected inside the annular groove (311). A spring (33) is fixedly connected to the surface of the partition (32). A locking ring (34) is fixedly connected to the surface of the spring (33). A push plate (35) is sleeved on the outside of the locking ring (34). The locking ring (34) and the push plate (35) have a spherical groove (341) and a movable groove (351) respectively. A pressing ball (36) slides at the overlap of the spherical groove (341) and the movable groove (351).

2. The PET preform injection molding apparatus according to claim 1, characterized in that: The locking ring (34) is slidably connected to the injection gun head (7), and the surface of the injection gun head (7) is provided with a limiting groove (71), and the clamping ball (36) slides inside the limiting groove (71).

3. The PET preform injection molding apparatus according to claim 1, characterized in that: The push plate (35) slides on the inner wall of the injection shell (31), and the protruding part of the surface of the push plate (35) abuts against the groove with the opening to the right of the injection shell (31).

4. The PET preform injection molding apparatus according to claim 2, characterized in that: The left side of the injection gun head (7) is slidably connected to a guide rod (8), which penetrates the surface of the PET bottle injection mold (1).

5. The PET preform injection molding apparatus according to claim 4, characterized in that: The PET bottle injection mold (1) has a fluid chamber (21) inside, which is connected to the guide rod (8).

6. The PET preform injection molding apparatus according to claim 5, characterized in that: The surface of the PET bottle injection mold (1) is provided with heat dissipation grooves, and the left side of the PET bottle injection mold (1) is provided with threaded grooves.

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