Injection molding structure for PET bottle blank

Abstract

The utility model provides an injection molding structure for a PET (Polyethylene Terephthalate) bottle preform, which belongs to the technical field of bottle preform injection molding and comprises an injection molding component, a mold component and a driving component, the injection molding assembly comprises a PET melting pipe and a colloid buffer box; the outlet end of the PET melting pipe is fixedly connected with the central position of the colloid buffer box; a regulating knob is rotationally mounted at one end, close to the PET melting pipe, of the colloid buffer box; a glue outlet head is mounted at one end, far away from the PET melting pipe, of the glue buffer box through threads; the glue outlet head is propped against the mold assembly; the mold assembly is adjustably mounted on the driving assembly; the injection molding structure can solve the problems that in the current bottle blank injection molding process, the glue outlet speed is singly adjusted and controlled, and the expected effect cannot be achieved in an auxiliary adjusting mode.

Description

Technical Field

[0001] The utility model belongs to the technical field of bottle blank injection molding, and specifically relates to an injection molding structure for PET bottle blanks. Background Art

[0002] The injection molding process refers to the process of making semi-finished products of a certain shape by pressurizing, injecting, cooling, and separating molten raw materials. The preform is formed by filling the raw materials into the gun mold of the mold under a specific temperature and pressure, and is formed under the working conditions of the injection molding machine. After injection molding, it is a semi-finished intermediate, and then blown into a terminal product. The high-temperature liquid PET material is processed into a preform through preliminary processing, and then the preform is blown into a PET bottle of the corresponding shape. In the process of processing liquid PET into preforms, the material needs to be filled into the mold. In the current conventional filling method, the discharge speed is only adjusted by changing the applied pressure, which requires extremely high pressure stability and cannot achieve the expected effect in the actual production process. Utility Model Content

[0003] In view of this, the utility model proposes an injection molding structure for PET bottle blanks, which utilizes a buffer zone and auxiliary adjustment to solve the problem that the glue discharge speed in the current PET bottle blank injection molding process is only adjusted by pressure alone and cannot achieve the expected effect.

[0004] The utility model provides an injection molding structure for PET bottle blanks, which comprises an injection molding component, a mold component and a driving component; the injection molding component comprises a PET melting tube and a colloid buffer box; the outlet end of the PET melting tube is fixedly connected to the center position of the colloid buffer box; the colloid buffer box is rotatably installed with a regulating knob at one end close to the PET melting tube; the colloid buffer box is threadedly installed with a glue discharge head at one end away from the PET melting tube; the glue discharge head is abutted against the mold component; the mold component can be adjustably installed on the driving component.

[0005] The technical effects of the injection molding structure for PET bottle blanks provided by the utility model are as follows: by setting a regulating knob, the distance between the end of the regulating knob close to the glue outlet head and the glue outlet head is adjusted to adjust the speed of the high-temperature liquid PET when it leaves the glue outlet head; by setting a driving component, the mold component can be regulated, which is convenient for assembly line processing and the use and inspection of injection-molded bottle blanks.

[0006] On the basis of the above technical solution, the injection molding structure for a PET bottle blank of the utility model can also be improved as follows:

[0007] Furthermore, the driving assembly includes a support frame, a top mold frame and a bottom mold frame; the top mold frame is rotatably mounted on the support frame, the bottom mold frame is fixedly mounted on one side of the support frame through a hydraulic cylinder, and the output shaft of the hydraulic cylinder is fixedly connected to the bottom mold frame; one end of the top mold frame is fixedly connected to a first gear; the first gear is meshed with a second gear; the second gear is fixedly mounted on the output shaft of the motor.

[0008] The beneficial effect of adopting the above further scheme is: by setting up a motor, the second gear and the first gear are driven to rotate, so as to drive the top mold frame to rotate, thereby realizing the replacement of the bottom mold and completing the alternating operation.

[0009] Furthermore, the mold assembly includes a bottom mold and a top mold; one end of the bottom mold abuts against the outlet of the glue discharge head; the other end of the bottom mold abuts against the top mold; the bottom mold is fixedly mounted on the bottom mold frame; and the top mold is fixedly mounted on the top mold frame.

[0010] Furthermore, a notch adapted to the port of the glue dispensing head is provided at one end of the bottom mold close to the glue dispensing head; the notch is communicated with the interior of the bottom mold.

[0011] The beneficial effect of adopting the above further solution is: by setting the notch, the cavity in the glue discharge head is directly connected with the cavity inside the bottom mold, so that the high-temperature liquid PET can enter the mold better.

[0012] Furthermore, the colloid buffer box is X-shaped, and the connection position between the PET melting tube and the colloid buffer box is located at the middle intersection.

[0013] Furthermore, the regulating knob is truncated into a cone shape at one end close to the glue dispensing head.

[0014] The beneficial effect of adopting the above further scheme is: by setting the end of the regulating knob to be frustoconical, when the regulating knob is close to the glue outlet head, the contact area between the glue outlet head and the liquid PET inside the colloid buffer box is reduced, thereby changing the speed of the liquid PET leaving the glue outlet head port.

[0015] Furthermore, the connection between the regulating knob and the colloid buffer box is oil-sealed.

[0016] The beneficial effect of adopting the above further solution is: by providing an oil seal treatment at the connection between the regulating knob and the colloid buffer box, liquid PET is prevented from overflowing from the connection between the regulating knob and the colloid buffer box.

[0017] Furthermore, the bottom molds are divided into 4 groups, the top molds are divided into 4 large groups, each large group has 4 small groups, and the 4 small groups of top molds correspond to the 4 groups of bottom molds respectively.

[0018] Compared with the prior art, the beneficial effects of the injection molding structure for PET bottle blanks provided by the utility model are as follows: by setting a colloid buffer box, the liquid PET material in the processing process is buffered; by setting a control knob and cooperating with a glue discharge head, the contact area between the glue discharge head and the liquid PET material in the colloid buffer box is changed, thereby changing the glue discharge speed; it can solve the problem that the glue discharge speed in the current PET bottle blank injection molding process is only adjusted by pressure alone, and the expected effect cannot be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure;

[0021] Figure 2 It is the side view of the whole knot;

[0022] Figure 3 It is a schematic diagram of the partial structure of the injection molding component;

[0023] Figure 4 It is a partial structural cross-sectional view of the injection molding component;

[0024] Figure 5 It is a schematic diagram of the drive structure.

[0025] Figure 6 It is a schematic diagram of the top mold and top mold frame structure;

[0026] Figure 7 It is a schematic diagram of the top mold and bottom mold structure;

[0027] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0028] 10. Injection molding components; 11. PET melting tube; 12. Colloid buffer box; 13. Control knob; 14. Glue outlet;

[0029] 20. mold assembly; 21. bottom mold; 22. top mold;

[0030] 30. Driving assembly; 31. Support frame; 32. Hydraulic cylinder; 33. Top mold frame; 34. Bottom mold frame; 35. First gear; 36. Second gear; 37. Motor. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0032] like Figure 1-7 As shown, the utility model provides an injection molding structure for PET bottle blanks, which includes an injection molding component 10, a mold component 20 and a drive component 30; the injection molding component 10 includes a PET melting tube 11 and a colloid buffer box 12; high-temperature liquid PET is stored in the PET melting tube 11; the outlet end of the PET melting tube 11 is thinner and fixedly connected to the center position of the colloid buffer box 12; four regulating knobs 13 are installed on the end of the colloid buffer box 12 close to the PET melting tube 11 through threaded rotation; a glue head 14 is fixedly installed on the end of the colloid buffer box 12 away from the PET melting tube 11 through threaded fixing; the regulating knob 13 corresponds to the glue head 14; the glue head 14 abuts against the mold component 20; the mold component 20 is adjustably installed on the drive component 30.

[0033] Optionally, in the above technical scheme, the driving assembly 30 includes a support frame 31, a top mold frame 33 and a bottom mold frame 34; the top mold frame 33 is rotatably mounted on the support frame 31, a hydraulic cylinder 32 is fixedly mounted on one side of the support frame 31, the output shaft of the hydraulic cylinder 32 is fixedly connected to the bottom mold frame 34, the end of the hydraulic cylinder 32 away from the output shaft is fixedly mounted on the support frame 31, and the bottom mold frame 34 is fixedly arranged between the top mold 22 and the glue discharge head 14; the top mold frame 33 is rotatably mounted on the support frame 31 through a bearing; one end of the top mold frame 33 is fixedly connected to a first gear 35; the first gear 35 is meshed with a second gear 36; the second gear 36 is fixedly mounted on the output shaft of the motor 37.

[0034] Optionally, in the above technical scheme, the mold assembly 20 includes a bottom mold 21 and a top mold 22; one end of the bottom mold 21 abuts against the outlet of the glue discharge head 14; the other end of the bottom mold 21 abuts against the top mold 22; the bottom mold 21 is fixedly mounted on the bottom mold frame 34; the top mold 22 is fixedly mounted on the top mold frame 33.

[0035] Optionally, in the above technical solution, a notch matched with the port of the glue dispensing head 14 is provided at one end of the bottom mold 21 close to the glue dispensing head 14 ; the notch is connected to the inside of the bottom mold 21 .

[0036] Optionally, in the above technical solution, the colloid buffer box 12 is X-shaped, and the connection position between the PET melting tube 11 and the colloid buffer box 12 is located at the middle intersection.

[0037] Optionally, in the above technical solution, the end of the regulating knob 13 close to the glue discharge head 14 is in a frustum shape.

[0038] Optionally, in the above technical solution, the connection between the regulating knob 13 and the colloid buffer box 12 is oil-sealed.

[0039] Optionally, in the above technical solution, there are 4 groups of bottom molds 21 and 4 large groups of top molds 22, each large group has 4 small groups, and the 4 small groups of top molds 22 correspond to the 4 groups of bottom molds 21 respectively.

[0040] When in use, the bottom mold 21 is fixedly mounted on the bottom mold frame 34, and the notch at the bottom of the bottom mold 21 is aligned with the discharge port of the glue head 14. At this time, the motor 37 is started to drive the first gear 35 and the second gear 36 to rotate, thereby driving the top mold frame 33 to rotate, and the hydraulic cylinder 32 is started to drive the support frame 31 close to the bottom mold frame 34; the top mold 21 is aligned with the bottom mold 22. Pressurize the PET melting tube 11, fill the liquid PET into the colloid buffer box 12, and enter the bottom mold 21 and the top mold through the glue head 14. After a period of time, when the molding is stable, the hydraulic cylinder 32 is started to drive the support frame 31 away from the bottom mold frame 34, and the molded preform is taken out. At this time, the motor 37 is started to drive the first gear 35 and the second gear 36 to rotate, and a new set of top molds 21 is replaced, and the above movement is repeated. During the molding process of the next set of preforms, the previous set of preforms is taken out, and the cycle is repeated.

[0041] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. An injection molding structure for a PET bottle blank, characterized in that: The invention comprises an injection molding component (10), a mold component (20) and a driving component (30); the injection molding component (10) comprises a PET melting tube (11) and a colloid buffer box (12); the outlet end of the PET melting tube (11) is fixedly connected to the center position of the colloid buffer box (12); a regulating knob (13) is rotatably mounted on one end of the colloid buffer box (12) close to the PET melting tube (11); a glue discharge head (14) is threadedly mounted on one end of the colloid buffer box (12) away from the PET melting tube (11); the glue discharge head (14) is in contact with the mold component (20); and the mold component (20) is adjustably mounted on the driving component (30).

2. The injection molding structure for PET preform according to claim 1, characterized in that: The driving assembly (30) comprises a support frame (31), a top mold frame (33) and a bottom mold frame (34); the top mold frame (33) is rotatably mounted on the support frame (31), the bottom mold frame (34) is fixedly mounted on one side of the support frame (31) via a hydraulic cylinder (32), and the output shaft of the hydraulic cylinder (32) is fixedly connected to the bottom mold frame (34); one end of the top mold frame (33) is fixedly connected to a first gear (35); the first gear (35) is meshedly mounted with a second gear (36); the second gear (36) is fixedly mounted on the output shaft of a motor (37).

3. The injection molding structure for PET preform according to claim 2, characterized in that: The mold assembly (20) comprises a bottom mold (21) and a top mold (22); one end of the bottom mold (21) abuts against the outlet of the glue discharge head (14); the other end of the bottom mold (21) abuts against the top mold (22); the bottom mold (21) is fixedly mounted on the bottom mold frame (34); and the top mold (22) is fixedly mounted on the top mold frame (33).

4. The injection molding structure for PET bottle blank according to claim 3, characterized in that: A notch adapted to the port of the glue dispensing head (14) is provided at one end of the bottom mold (21) close to the glue dispensing head (14); the notch is communicated with the interior of the bottom mold (21).

5. The injection molding structure for PET preform according to claim 4, characterized in that: The colloid buffer box (12) is X-shaped, and the connection position between the PET melting tube (11) and the colloid buffer box (12) is located at a middle intersection.

6. The injection molding structure for PET preform according to claim 5, characterized in that: The end of the regulating knob (13) close to the glue dispensing head (14) is in the shape of a truncated cone.

7. The injection molding structure for PET preform according to claim 6, characterized in that: The connection between the regulating knob (13) and the colloid buffer box (12) is oil-sealed.

8. The injection molding structure for PET preform according to claim 7, characterized in that: The bottom molds (21) are divided into four groups, and the top molds (22) are divided into four large groups, each large group includes four small groups, and the four small groups of top molds (22) correspond to the four groups of bottom molds (21) respectively.

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