A pet preform mold

Abstract

The utility model discloses a kind of PET bottle embryo mould, belong to mould field.The device includes: base, mould assembly, compression assembly and cooling piece.Sliding slot is opened in base.Mould assembly includes mould one and mould two;Mould one is fixedly connected on base, and mould two is slidably connected at sliding slot;Mould one and mould two are respectively opened with bottle blank cavity between them.Compression assembly is set on mould assembly, for the mould one and mould two compression.The utility model is rotated by breaking handle and supporting rod and cam, so that the two sides of cam protruding end are respectively connected with card slot one and card slot two, so that the mould one and mould two can be compressed, and the sealing between mould one and mould two is improved.It can prevent molten material from leaking during injection molding, ensure the integrity of the formed bottle blank, and reduce the generation of defective products.Meanwhile, it can ensure the position stability when mould one and mould two are closed, and will not be offset due to injection pressure, so that the size of each part of bottle blank is accurate, and the product quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of molds, and in particular to a PET preform mold. Background Technology

[0002] PET preforms are intermediate injection molding products made from polyethylene terephthalate (PET). They are mainly used for blow molding beverage bottles and daily chemical packaging containers, and feature high transparency, excellent mechanical properties, and chemical resistance. PET preform molds are specialized molds used to produce PET preforms.

[0003] Existing PET preform molds typically consist of two separate molds that need to be joined together during injection molding. However, during mold closing, the two molds are usually only pushed together by external force, resulting in insufficient sealing between them. This can cause leakage of molten material during injection molding, leading to flash and burrs on the preform and ultimately, defective products.

[0004] Therefore, this utility model proposes a PET preform mold. Utility Model Content

[0005] This invention provides a PET preform mold that solves the problem in the prior art where, during mold closing, the two molds are usually only pushed together by external force, resulting in insufficient sealing between the two molds. This can cause leakage of molten material during injection molding, leading to flash and burrs on the preform and resulting in defective products.

[0006] A PET preform mold, comprising: The system comprises a base, a mold assembly, a clamping assembly, and a cooling component. The base has a sliding groove. The mold assembly includes mold one and mold two; mold one is fixedly connected to the base, and mold two is slidably connected to the sliding groove; preform cavities are respectively formed between mold one and mold two. The clamping assembly is mounted on the mold assembly to clamp mold one and mold two; the clamping assembly includes two sets of slider one and slider two; two sets of slider one are respectively located on both sides of mold one, and two sets of slider two are respectively located on both sides of mold two; each set of slider one has a fixed sliding rod; the sliding rod passes through the corresponding side of slider two and is slidably connected to slider two; a spring connects slider one and slider two; the spring is wound around the outside of the sliding rod; the other end of both sets of sliding rods is fixedly connected to a pull rod; a support rod is also rotatably mounted on the base; a cam is fixedly mounted on the support rod; the cam engages with mold two and the pull rod respectively. Cooling components are respectively located inside mold one and mold two to cool the preform.

[0007] Preferably, multiple sets of clamping components are arranged along the height direction of mold one and mold two.

[0008] Preferably, both sides of mold one and mold two are fixedly provided with slide rails; the slide rails are set perpendicular to the upper surface of the base; slider one and slider two are slidably connected in the corresponding slide rails.

[0009] Preferably, the pull rod has a slot one on the side facing the mold two; the cam engages with the slot one.

[0010] Preferably, the mold has a slot on the side facing the pull rod; the cam engages with the slot.

[0011] Preferably, a handle is fixedly provided at the upper end of the support rod.

[0012] Preferably, the side wall of mold two is fixedly provided with a sealing strip; the side wall of mold one is provided with a sealing groove; the sealing strip and the sealing groove are engaged and snapped together.

[0013] Preferably, both the sealing strip and the sealing groove are arranged around the preform cavity.

[0014] Preferably, both mold one and mold two have cavities; the cooling component includes an air pump located on the side wall of mold one / mold two; a cooling pipe is connected to the air pump; the cooling pipe is located inside the cavity; and multiple nozzles are evenly distributed on the side of the cooling pipe facing the preform cavity.

[0015] Preferably, the cooling pipe has an S-shaped continuous bending structure and is designed to fit the curvature of the preform cavity.

[0016] Compared with the prior art, the present invention has the following beneficial technical effects: (1) The PET preform mold includes two sets of sliders, slider 1 and slider 2; slider 1 is respectively set on both sides of mold 1, and slider 2 is respectively set on both sides of mold 2; each set of slider 1 is fixedly provided with a sliding rod; the sliding rod passes through the corresponding side slider 2 and is slidably connected to slider 2; a spring is connected between slider 1 and slider 2; the spring is wrapped around the outside of the sliding rod; the other end of the two sets of sliding rods is fixedly connected to a pull rod; a support rod is also rotatably provided on the base; a cam is fixedly provided on the support rod; the cam is respectively engaged with mold 2 and pull rod. By turning the handle to drive the support rod and cam to rotate, the two protruding ends of the cam are respectively engaged with slot 1 and slot 2, thereby pressing mold 1 and mold 2 together and improving the sealing between mold 1 and mold 2. This can prevent leakage of molten material during injection molding, ensure the integrity of the preform, and reduce the production of defective products. At the same time, it can ensure that the position of mold 1 and mold 2 is stable when the mold is closed and will not shift due to injection pressure, thereby making the dimensions of each part of the preform accurate and improving product quality.

[0017] (2) The PET preform mold includes an air pump located on the side wall of mold one / mold two; a cooling pipe is connected to the air pump; the cooling pipe is located inside the cavity; multiple nozzles are evenly distributed on the side of the cooling pipe facing the preform cavity. By starting the air pump, cold air flows along the cooling pipe and is precisely blown onto the preform cavity through the nozzles, which can quickly remove heat, allowing the preform to cool and solidify rapidly, significantly shortening the preform molding cycle and improving production efficiency. The cooling pipe is set close to the preform cavity to allow for more uniform cooling, avoiding uneven shrinkage, deformation, or wall thickness deviation of the preform due to temperature differences, thereby ensuring dimensional accuracy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the PET preform mold structure of this utility model; Figure 2 This is a schematic diagram of the pressing component structure of this utility model; Figure 3 This is a schematic diagram of the cooling component structure of this utility model.

[0019] Explanation of reference numerals in the attached figures: 1. Base; 11. Slide groove; 2. Mold assembly; 21. Mold one; 22. Mold two; 23. Preform cavity; 24. Sealing strip; 25. Sealing groove; 3. Pressing assembly; 31. Slide rail; 321. Slider one; 322. Slider two; 33. Slide rod; 34. Spring; 35. Pull rod; 36. Support rod; 37. Cam; 38. Handle; 39. Slot one; 310. Slot two; 4. Cooling component; 41. Chamber; 42. Air pump; 43. Cooling pipe. Detailed Implementation

[0020] The specific embodiments of this utility model are described in detail below, but it should be understood that the protection scope of this utility model is not limited to the specific embodiments.

[0021] like Figure 1-3As shown in the figure, an embodiment of the present invention provides a PET preform mold, including a base 1, a mold assembly 2, a clamping assembly 3, and a cooling component 4. A groove 11 is provided on the base 1. The mold assembly 2 includes a first mold 21 and a second mold 22; the first mold 21 is fixedly connected to the base 1, and the second mold 22 is slidably connected to the groove 11; a preform cavity 23 is provided between the first mold 21 and the second mold 22. A clamping assembly 3 is mounted on mold assembly 2 to clamp mold one 21 and mold two 22. The clamping assembly 3 includes two sets of sliders 321 and 322. Slider one 321 is mounted on both sides of mold one 21, and slider two 322 is mounted on both sides of mold two 22. Each set of slider one 321 is fixedly equipped with a sliding rod 33. The sliding rod 33 passes through the corresponding side slider two 322 and is slidably connected to it. A spring 34 connects slider one 321 and slider two 322. The spring 34 is wound around the outside of the sliding rod 33. The other ends of both sets of sliding rods 33 are fixedly connected to a pull rod 35. A support rod 36 is also rotatably mounted on the base 1. A cam 37 is fixedly mounted on the support rod 36. The cam 37 engages with mold two 22 and pull rod 35 respectively. Cooling components 4 are respectively mounted inside mold one 21 and mold two 22 to cool the preform.

[0022] To further explain, multiple sets of clamping components 3 are arranged along the height direction of mold 1 21 and mold 2 22, which allows mold 1 21 and mold 2 22 to fit more tightly. Slide rails 31 are fixedly provided on both sides of mold 1 21 and mold 2 22; the slide rails 31 are perpendicular to the upper surface of the base 1; slider 1 321 and slider 2 322 are slidably connected within their respective slide rails 31. When it is necessary to remove the preform, the pull rod 35 can be pulled down, causing slider 1 321 and slider 2 322 to slide down along the slide rail 31 to their lowest point, avoiding obstruction to the preform removal process. A slot 1 39 is provided on the side of pull rod 35 facing mold 2 22; cam 37 engages with slot 1 39. A slot 2 310 is provided on the side of mold 2 22 facing pull rod 35; cam 37 engages with slot 2 310. One side of the cam 37 engages with slot 39, and the other side engages with slot 310, preventing the cam 37 from slipping and falling out between mold 22 and pull rod 35, thus preventing mold 1 21 and mold 2 22 from separating. A handle 38 is fixedly provided at the upper end of the support rod 36 to facilitate the rotation of the support rod 36.

[0023] By clamping mold 1 (21) and mold 2 (22) together, the sealing between them is improved, preventing leakage of molten material during injection molding, ensuring the integrity of the preform, and reducing the production of defective products. At the same time, it ensures that mold 1 (21) and mold 2 (22) are in a stable position when closed, and will not shift due to injection pressure, thus ensuring precise dimensions of all parts of the preform and improving product quality.

[0024] To further explain, the side wall of mold 22 is fixedly provided with a sealing strip 24; the side wall of mold 1 21 is provided with a sealing groove 25; the sealing strip 24 and the sealing groove 25 are engaged and snapped together. Both the sealing strip 24 and the sealing groove 25 are arranged around the preform cavity 23. This can enhance the sealing performance when mold 1 21 and mold 2 22 are joined, prevent melt overflow during injection molding, and avoid flash and burrs on the preform.

[0025] Further explanation: Both mold 1 (21) and mold 2 (22) have chambers 41. The cooling component 4 includes an air pump 42 located on the side wall of mold 1 (21) / mold 2 (22). A cooling pipe 43 is connected to the air pump 42. The cooling pipe 43 is located within the chamber 41. Multiple nozzles are evenly distributed on the side of the cooling pipe 43 facing the preform cavity 23. The cooling pipe 43 has an S-shaped continuous bending structure and is designed to fit the curvature of the preform cavity 23. When the air pump 42 is activated, cold air flows along the cooling pipe 43 and is precisely directed to the preform cavity 23 through the nozzles, which can quickly remove heat, allowing the preform to cool and solidify rapidly, significantly shortening the preform molding cycle and improving production efficiency. The design of the cooling pipe 43 to fit the preform cavity 23 ensures more uniform cooling, preventing uneven shrinkage, deformation, or wall thickness deviation of the preform due to temperature differences, thereby ensuring dimensional accuracy.

[0026] The working principle of this utility model is as follows: Before injection molding, by turning the handle 38, the support rod 36 and the cam 37 are rotated, so that the two protruding ends of the cam 37 are respectively engaged with the first slot 39 and the second slot 310, thereby pressing the mold 1 21 and the mold 2 22 tightly and improving the sealing between the mold 1 21 and the mold 2 22. During injection molding, the air pump 42 is started, so that cold air flows along the cooling pipe 43 and is precisely blown into the preform cavity 23 through the nozzle, which can quickly remove heat and allow the preform to cool and solidify rapidly. After injection molding, the handle 38 is turned again, so that the cam 37 disengages from the first slot 39 and the second slot 310, thereby causing the spring 34 to return to its original position and push the mold 2 22 to slide along the slide groove 11, so that the mold 1 21 and the mold 2 22 are separated. Then, the pull rod 35 is pulled down, so that the slider 1 321 and the slider 2 322 slide down along the slide rail 31 to the lowest position, at which point the molded preform can be removed.

[0027] The above-disclosed embodiments are only a few specific examples of the present utility model. However, the embodiments of the present utility model are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present utility model.

Claims

1. A PET preform mold, characterized in that, include: Base (1); A sliding groove (11) is provided on the base (1); Mold assembly (2); Mold assembly (2) includes mold one (21) and mold two (22); mold one (21) is fixedly connected to the base (1), and mold two (22) is slidably connected to the slide groove (11); a preform cavity (23) is opened between mold one (21) and mold two (22). A clamping assembly (3) is installed on the mold assembly (2) to clamp mold one (21) and mold two (22). The clamping assembly (3) includes two sets of slider one (321) and slider two (322). The two sets of slider one (321) are respectively installed on both sides of mold one (21), and the two sets of slider two (322) are respectively installed on both sides of mold two (22). A sliding rod (33) is fixedly installed on each of the two sets of slider one (321). The sliding rod (33) passes through the two molds. The second slider (322) is slidably connected to the second slider (322); a spring (34) is connected between the first slider (321) and the second slider (322); the spring (34) is wrapped around the outside of the slide rod (33); the other ends of the two sets of slide rods (33) are fixedly connected to the pull rod (35); a support rod (36) is also rotatably provided on the base (1); a cam (37) is fixedly provided on the support rod (36); the cam (37) is respectively engaged with the second mold (22) and the pull rod (35); Cooling component (4); The cooling component (4) is respectively installed in mold one (21) and mold two (22) for cooling the preform.

2. A PET preform mold according to claim 1, characterized in that, Multiple sets of clamping components (3) are arranged along the height direction of mold one (21) and mold two (22).

3. A PET preform mold according to claim 2, characterized in that, Both sides of mold 1 (21) and mold 2 (22) are fixedly provided with slide rails (31); the slide rails (31) are set perpendicular to the upper surface of the base (1); slider 1 (321) and slider 2 (322) are slidably connected in the corresponding slide rails (31).

4. A PET preform mold according to claim 3, characterized in that, The pull rod (35) has a slot (39) on the side facing the mold (22); the cam (37) engages with the slot (39).

5. A PET preform mold according to claim 4, characterized in that, The mold (22) has a slot (310) on the side facing the pull rod (35); the cam (37) engages with the slot (310).

6. A PET preform mold according to claim 5, characterized in that, A handle (38) is fixedly provided at the upper end of the support rod (36).

7. A PET preform mold according to claim 1, characterized in that, The side wall of mold 2 (22) is fixed with a sealing strip (24); the side wall of mold 1 (21) is provided with a sealing groove (25); the sealing strip (24) and the sealing groove (25) are engaged and snapped together.

8. A PET preform mold according to claim 7, characterized in that, Both the sealing strip (24) and the sealing groove (25) are arranged around the preform cavity (23).

9. A PET preform mold according to claim 1, characterized in that, Both mold 1 (21) and mold 2 (22) have a cavity (41); the cooling component (4) includes an air pump (42) located on the side wall of mold 1 (21) / mold 2 (22); the air pump (42) is connected to a cooling pipe (43); the cooling pipe (43) is located in the cavity (41); the cooling pipe (43) has multiple nozzles evenly distributed on the side facing the preform cavity (23).

10. A PET preform mold according to claim 9, characterized in that, The cooling pipe (43) has an S-shaped continuous bending structure and is set to fit the curvature of the preform cavity (23).

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