Multi-mold-cavity PET bottle preform mold

Abstract

The utility model discloses a multi-mold-cavity PET bottle preform mold, and belongs to the field of bottle preform molds. Comprising a first connecting plate and a second connecting plate, a plurality of first mounting plates are fixed to the side wall of the first connecting plate, second mounting plates corresponding to the first mounting plates are fixedly embedded into the side wall of the second connecting plate, a plurality of forming rods are fixed to the side walls of the first mounting plates, and conveying mechanisms corresponding to the forming rods are arranged in the first mounting plates; a forming groove is formed in the side wall of the second mounting plate, demolding plates are embedded in the inner wall of the forming groove, and an elastic pneumatic mechanism used for driving the demolding plates to move is arranged in the second mounting plate. The multi-mold-cavity PET bottle preform mold has the beneficial effects that the PET bottle preform injection molding and demolding efficiency is improved, and the multi-mold-cavity PET bottle preform mold capable of rapidly demolding multiple mold cavities is provided.

Description

Technical Field

[0001] This application relates to the field of preform molds, and more specifically, to a multi-cavity PET preform mold. Background Art

[0002] A PET preform mold is a special injection mold dedicated to producing preforms made of PET (polyester) material. Preforms are intermediate products for containers such as plastic bottles and oil drums. After injection molding, they are further processed through subsequent processes such as blow molding into the final bottles or containers. The precise design and high-quality manufacturing of PET preform molds directly affect the forming quality of preforms, production efficiency, and the smooth progress of subsequent processing.

[0003] The patent with application number 202110139170.8 discloses a multi-cavity PET preform mold, including a left mold, a right mold, a first driving rod for moving the right mold, a heating cavity provided on the left mold, a left cavity provided on the left mold, a right cavity provided on the right mold, a plurality of shaping components provided on the left mold, a feeding component provided on the heating cavity, a transporting component provided on the left mold, and a blow molding component provided on the right mold; the left cavity and the right cavity can be combined to form a preform cavity.

[0004] The above technical solution requires heating the preform first and then blow molding it through the mold. There is a lot of waste generated during blow molding, which is not applicable to the processing and forming of small bottles. Moreover, only a single bottle can be processed at a time during blow molding, and there are difficulties in demolding during the processing, resulting in low processing efficiency. Summary of the Utility Model

[0005] This part of the content of this application is used to briefly introduce the concepts, which will be described in detail in the subsequent detailed implementation part. This part of the content of this application is not intended to identify the key features or essential features of the claimed technical solution, nor is it intended to limit the scope of the claimed technical solution.

[0006] To solve the technical problems mentioned in the above background art part, some embodiments of this application provide a multi-cavity PET preform mold, including a first connecting plate and a second connecting plate connected to each other; a plurality of first mounting plates are fixed on the side wall of the first connecting plate, and second mounting plates corresponding to the first mounting plates are embedded and fixed on the side wall of the second connecting plate. A plurality of forming rods are fixed on the side wall of the first mounting plate, and a conveying mechanism corresponding to the plurality of forming rods is arranged in the first mounting plate. A forming groove is formed on the side wall of the second mounting plate, and a demolding plate is embedded in the inner wall of the forming groove. An elastic pneumatic mechanism for driving the plurality of demolding plates to move is arranged in the second mounting plate.

[0007] A plurality of forming rods are fixed to the side wall of the first mounting plate. The forming rods are inserted into the forming grooves, and injection molding is carried out through the gaps between the forming rods and the forming grooves. The raw material moves along the outer walls of the plurality of conveying grooves and the forming rods through the conveying pipe and the conveying holes to the gaps of the forming grooves, which is convenient for synchronously injecting the raw material into the gaps between the plurality of forming rods and the forming grooves for injection molding, improving the injection molding efficiency of the PET preforms; by providing a demolding hole on the second mounting plate, and both ends of the spring are respectively abutted against the inner wall of the mounting hole and the pressing plate, thereby pushing the pressing plate to be pulled into the demolding plate through the connecting rod in an embedded manner. When demolding, pressure is input to the side walls of the plurality of pressing plates through the demolding hole and the pressure holes, so that the pressing plate drives the connecting rod to make the demolding plate push the PET preforms out of the forming grooves, improving the convenience of demolding the PET preforms.

[0008] Further, a plurality of positioning tubes are arranged in a rectangular array on the second connecting plate, and a plurality of positioning rods that are fitted and inserted into the positioning tubes are fixed to the side wall of the first connecting plate. A conveying pipe fixed to the first mounting plate is provided on the first connecting plate, and legs are fixed to both sides of the bottom end surfaces of the first connecting plate and the second connecting plate.

[0009] Further, the conveying mechanism includes a conveying hole opened at the central position of the first mounting plate and a conveying groove on the inner wall of the conveying hole. The plurality of conveying grooves are all communicated with the outer wall of the forming rod.

[0010] Further, an air inlet pipe is installed on the outer wall of the second connecting plate, and a demolding hole connected to the air inlet pipe is opened at the central position of the second connecting plate.

[0011] Further, a plurality of pressure holes corresponding to the forming grooves are opened on the inner wall of the demolding hole. The pressure holes are in a conical structure, and mounting holes are opened on the inner walls of the pressure holes.

[0012] Further, the elastic pneumatic mechanism includes a spring and a pressing plate embedded in the mounting hole. A through hole communicated with the forming groove is opened on the inner wall of the mounting hole.

[0013] Further, the demolding plate is embedded in the through hole, and a connecting rod fixed to the pressing plate is installed on the side wall of the demolding plate.

[0014] Further, the pressing plate is hermetically connected to the inner wall of the mounting hole, and the side wall of the pressing plate abuts against the inner wall of the pressure hole.

[0015] The beneficial effects of the present application are as follows: By fixing a plurality of forming rods on the side wall of the first mounting plate, the forming rods are inserted into the forming grooves, and injection molding is carried out through the gaps between the forming rods and the forming grooves. The raw materials move along the outer walls of the plurality of conveying grooves and the forming rods through the conveying pipes and the conveying holes to the gaps of the forming grooves, facilitating the synchronous injection of raw materials into the gaps between the plurality of forming rods and the forming grooves for injection molding, and improving the injection molding efficiency of PET preforms.

[0016] By providing demolding holes on the second mounting plate, and the two ends of the spring are respectively abutted against the inner wall of the mounting hole and the pressing plate, thereby pushing the pressing plate to be embedded in the demolding plate through the connecting rod. When demolding, pressure is input to the side walls of the plurality of pressing plates through the demolding holes and the pressure holes, so that the pressing plate drives the connecting rod to make the demolding plate push the PET preform out of the forming groove, improving the convenience of demolding the PET preform. Description of the Drawings

[0017] Figure 1 is the overall schematic diagram according to the embodiment of the present application;

[0018] Figure 2 is the cross-sectional structural schematic diagram of the first mounting plate;

[0019] Figure 3 is Figure 2 the enlarged schematic diagram of the structure at A of

[0020] Figure 4 is the cross-sectional structural schematic diagram of the second connecting plate;

[0021] Figure 5 is Figure 4 the enlarged schematic diagram of the structure at B of

[0022] Description of the reference numerals: 1. First connecting plate; 2. First mounting plate; 3. Leg; 4. Positioning tube; 5. Second connecting plate; 6. Positioning rod; 7. Conveying pipe; 8. Forming rod; 9. Conveying groove; 10. Conveying hole; 11. Forming groove; 12. Second mounting plate; 13. Demolding hole; 14. Pressure hole; 15. Spring; 16. Mounting hole; 17. Demolding plate; 18. Connecting rod; 19. Pressing plate. Detailed Description of the Embodiment

[0023] Hereinafter, embodiments of the present disclosure will be described in more detail with reference to the drawings. Although some embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided to more thoroughly and completely understand the present disclosure. It should be understood that the drawings and embodiments of the present disclosure are only for exemplary purposes and are not used to limit the protection scope of the present disclosure.

[0024] In addition, it should be noted that for ease of description, only the parts related to the relevant invention are shown in the drawings. Without conflict, the embodiments in the present disclosure and the features in the embodiments can be combined with each other.

[0025] The present disclosure will be described in detail below with reference to the drawings and in conjunction with embodiments.

[0026] Referring to Figure 1 , Figure 2 and Figure 3 , a multi-mode cavity PET preform mold includes a first connecting plate 1 and a second connecting plate 5 connected to each other; a plurality of first mounting plates 2 are fixed to the side wall of the first connecting plate 1, and second mounting plates 12 corresponding to the first mounting plates 2 are embedded and fixed to the side wall of the second connecting plate 5. A plurality of forming rods 8 are fixed to the side wall of the first mounting plate 2, and a conveying mechanism corresponding to the plurality of forming rods 8 is provided in the first mounting plate 2. A forming groove 11 is formed in the side wall of the second mounting plate 12, and a demolding plate 17 is embedded in the inner wall of the forming groove 11. An elastic pneumatic mechanism for driving the plurality of demolding plates 17 to move is provided in the second mounting plate 12. The forming rods 8 are inserted into the forming groove 11, and injection molding is performed through the gap between the forming rods 8 and the forming groove 11. The raw material moves along the outer walls of the plurality of conveying grooves 9 and the forming rods 8 through the conveying pipe 7 and the conveying holes 10 to the gap of the forming groove 11, facilitating synchronous injection molding by injecting the raw material into the gap between the plurality of forming rods 8 and the forming groove

[0027] Referring to Figure 4 and Figure 5, a plurality of positioning tubes 4 are arranged in a rectangular array on the second connecting plate 5. A plurality of positioning rods 6 that are fitted and inserted into the positioning tubes 4 are fixed on the side wall of the first connecting plate 1. A conveying tube 7 fixed to the first mounting plate 2 is arranged on the first connecting plate 1. Legs 3 are fixed to both sides of the bottom end surfaces of the first connecting plate 1 and the second connecting plate 5. The conveying mechanism includes a conveying hole 10 opened at the center position of the first mounting plate 2 and a conveying groove 9 on the inner wall of the conveying hole 10. The plurality of conveying grooves 9 communicate with the outer wall of the forming rod 8. An air inlet pipe is installed on the outer wall of the second connecting plate 5, and a demolding hole 13 connected to the air inlet pipe is opened at the center position of the second connecting plate 5. A plurality of pressure holes 14 corresponding to the forming grooves 11 are opened on the inner wall of the demolding hole 13. The pressure holes 14 are in a conical structure, and an installation hole 16 is opened on the inner wall of the pressure hole 14. The elastic pneumatic mechanism includes a spring 15 and an extrusion plate 19 embedded in the installation hole 16. A through hole communicating with the forming groove 11 is opened on the inner wall of the installation hole 16. A demolding plate 17 is embedded in the through hole, and a connecting rod 18 fixed to the extrusion plate 19 is installed on the side wall of the demolding plate 17. The extrusion plate 19 is hermetically connected to the inner wall of the installation hole 16, and the side wall of the extrusion plate 19 abuts against the inner wall of the pressure hole 14. Both ends of the spring 15 abut against the inner wall of the installation hole 16 and the extrusion plate 19 respectively, so as to push the extrusion plate 19 to be pulled and embedded with the demolding plate 17 through the connecting rod 18. When demolding, pressure is input to the side walls of the plurality of extrusion plates 19 through the demolding hole 13 and the pressure holes 14, so that the extrusion plate 19 drives the connecting rod 18 to make the demolding plate 17 push the PET preform out of the forming groove 11.

[0028] Working principle: When in use, the positioning rod 6 is inserted into the positioning tube 4 to connect the first connecting plate 1 and the second connecting plate 5. The forming rod 8 is inserted into the forming groove 11, and injection molding is carried out for the gap between the forming rod 8 and the forming groove 11. The raw material moves along the plurality of conveying grooves 9 and the outer wall of the forming rod 8 through the conveying tube 7 and the conveying hole 10 to the gap of the forming groove 11, which is convenient for simultaneously injecting raw materials into the gaps between the plurality of forming rods 8 and the forming grooves 11 for injection molding, improving the injection molding efficiency of the PET preform; both ends of the spring 15 abut against the inner wall of the installation hole 16 and the extrusion plate 19 respectively, so as to push the extrusion plate 19 to be pulled and embedded with the demolding plate 17 through the connecting rod 18. When demolding, pressure is input to the side walls of the plurality of extrusion plates 19 through the demolding hole 13 and the pressure holes 14, so that the extrusion plate 19 drives the connecting rod 18 to make the demolding plate 17 push the PET preform out of the forming groove 11, improving the convenience of demolding the PET preform.

[0029] The above description is only some preferred embodiments of the present disclosure and an explanation of the technical principles applied. Those skilled in the art should understand that the scope of the invention involved in the embodiments of the present disclosure is not limited to the technical solutions formed by the specific combination of the above technical features, and should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the above inventive concept. For example, the technical solutions formed by mutually replacing the above features with the technical features (but not limited to) disclosed in the embodiments of the present disclosure that have similar functions.

Claims

1. A multi-cavity PET preform mold, comprising: The mutually connected first connecting plate (1) and second connecting plate (5); It is characterized in that: A plurality of first mounting plates (2) are fixed on the side wall of the first connecting plate (1), and second mounting plates (12) corresponding to the first mounting plates (2) are embedded and fixed on the side wall of the second connecting plate (5). A plurality of forming rods (8) are fixed on the side wall of the first mounting plate (2), and a conveying mechanism corresponding to the plurality of forming rods (8) is arranged in the first mounting plate (2). A forming groove (11) is formed in the side wall of the second mounting plate (12), and a demolding plate (17) is embedded in the inner wall of the forming groove (11). An elastic pneumatic mechanism for driving the plurality of demolding plates (17) to move is arranged in the second mounting plate (12).

2. The multi-cavity PET preform mold according to claim 1, characterized in that: A plurality of positioning tubes (4) are arranged in a rectangular array on the second connecting plate (5), and a plurality of positioning rods (6) that fit snugly into the positioning tubes (4) are fixed on the side wall of the first connecting plate (1). A conveying tube (7) fixed to the first mounting plate (2) is arranged on the first connecting plate (1). Legs (3) are fixed to both sides of the bottom ends of the first connecting plate (1) and the second connecting plate (5).

3. The multi-cavity PET preform mold according to claim 2, characterized in that: The conveying mechanism includes a conveying hole (10) opened at the central position of the first mounting plate (2) and a conveying groove (9) on the inner wall of the conveying hole (10). The plurality of conveying grooves (9) are all communicated with the outer wall of the forming rod (8).

4. The multi-cavity PET preform mold according to claim 1, wherein: An air inlet pipe is installed on the outer wall of the second connecting plate (5), and a demolding hole (13) connected to the air inlet pipe is opened at the central position of the second connecting plate (5).

5. The multi-cavity PET preform mold according to claim 4, wherein: A plurality of pressure holes (14) corresponding to the forming grooves (11) are formed in the inner wall of the demolding hole (13). The pressure holes (14) are in a conical structure, and mounting holes (16) are formed in the inner wall of the pressure holes (14).

6. The multi-cavity PET preform mold according to claim 5, characterized in that: The elastic pneumatic mechanism includes a spring (15) and an extrusion plate (19) embedded in the mounting hole (16). A through hole communicated with the forming groove (11) is formed in the inner wall of the mounting hole (16).

7. The multi-cavity PET preform mold according to claim 6, characterized in that: The demolding plate (17) is embedded in the through hole, and a connecting rod (18) fixed to the extrusion plate (19) is installed on the side wall of the demolding plate (17).

8. The multi-cavity PET preform mold according to claim 7, characterized in that: The extrusion plate (19) is hermetically connected to the inner wall of the mounting hole (16), and the side wall of the extrusion plate (19) abuts against the inner wall of the pressure hole (14).

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