A bottle preform blow molding apparatus and system with positioning function

Abstract

A bottle embryo blowing device with positioning function and a bottle embryo blowing system; the bottle embryo blowing device comprises a front mold, a rear mold, a mold moving mechanism and a blowing mechanism; the front mold and the rear mold are respectively provided with a mold cavity; the output end of the mold moving mechanism is connected to the front mold, used for driving the front mold to move to the rear mold direction, so that the mold cavities of the front mold and the rear mold are sealed and closed; the embryo seat is provided with a fixing port, one end of the fixing port is used for fixing the bottle mouth of the bottle embryo; the embryo seat is limited in the bottle mouth containing area of the front mold and the rear mold; the other end of the fixing port is used for communicating with the air inlet pipe; the bottle embryo is provided with a positioning protrusion, the inner wall of the bottle mouth containing area and / or the inner wall of the fixing port is provided with a positioning groove, and the positioning protrusion is limited in the positioning groove. The scheme realizes the angle positioning of the bottle embryo, can ensure that the bottle embryo is formed in the mold cavity at a specific angle, and solves the problem that the profile of the bottle body after the bottle body is demolded cannot correspond to the bottle cap.

Description

Technical Field

[0001] This utility model relates to the field of bottle blow molding equipment, and in particular to a preform blow molding device and a preform blow molding system with positioning function. Background Technology

[0002] Bottles are generally formed using blow molding, for example, after the plastic raw material is dried and dehumidified, it is heated and melted to form liquid plastic, and then preformed into bottle preforms through injection molding or extrusion. The bottle preform is usually tubular, with the bottle neck already formed and equipped with a support ring for subsequent fixation. Air is injected into the preform after preheating, so that the preform completely fits the inner wall of the mold. However, existing bottle blow molding processes are prone to misalignment between the external threads of the bottle neck and the bottle cap. This is primarily because the preform is placed into the mold at a random angle. Assuming the position of the cap's internal thread remains constant, the bottle neck's external thread requires multiple angle adjustments to find the optimal fit during the automatic mating process. This is especially noticeable with non-cylindrical bottles, such as square bottles. After molding, the starting point of the external thread structure at the bottle neck may align with different sides; for example, the starting point could be the front, back, left, side, or a corner between sides. If a square cap is used with a square bottle, the sides of the cap may not be parallel to the sides of the bottle, affecting the bottle's aesthetics. Therefore, existing bottle blow molding processes suffer from a misalignment between the bottle body and the cap's contours after the preform is demolded. Utility Model Content

[0003] The purpose of this utility model is to propose a bottle preform blow molding device with positioning function, which uses a preform seat to fix the bottle preform, so that the bottle preform can be placed between the bottle mouth receiving area. The inner wall of the bottle mouth receiving area and / or the inner wall of the fixing port are provided with positioning grooves, which can correspond to the positioning protrusions of the bottle preform, thereby realizing the angular positioning of the bottle preform.

[0004] This utility model also proposes a preform blow molding system, which is equipped with the above-mentioned preform blow molding device with positioning function.

[0005] To achieve this objective, the present invention adopts the following technical solution:

[0006] A preform blow molding device with positioning function includes: a front mold, a rear mold, a mold moving mechanism, and a blow molding mechanism;

[0007] The front mold and the rear mold are each provided with a mold cavity; the output end of the mold moving mechanism is connected to the front mold and is used to drive the front mold to move towards the rear mold, so that the mold cavities of the front mold and the rear mold are sealed and closed; the mold cavity is provided with a bottle body forming area and a bottle mouth receiving area that are interconnected.

[0008] The blow molding mechanism includes: a preform holder and an air inlet pipe;

[0009] The preform holder is provided with a fixing port, one end of which is used to fix the bottle mouth of the preform; the preform holder is limited to the bottle mouth receiving area of ​​both the front mold and the rear mold; the other end of the fixing port is used to connect to the air inlet pipe;

[0010] The preform is provided with a positioning protrusion, and the inner wall of the bottle mouth receiving area and / or the inner wall of the fixing port is provided with a positioning groove, and the positioning protrusion is limited to the positioning groove.

[0011] Optimally, the bottle neck receiving area includes, from high to low, a bottle neck receiving portion and a seat receiving portion;

[0012] The bottle neck receiving portion is provided with the positioning groove; the bottle preform is provided with an annular plate between the bottle mouth and the bottle neck, and the annular plate is provided with the positioning protrusion; the annular plate is provided in the bottle neck receiving portion; the preform seat is provided in the seat receiving portion.

[0013] Alternatively, the embryo base is provided with the positioning groove, and the positioning protrusion of the annular plate is fixed to the positioning groove of both the embryo base and the bottleneck receiving portion.

[0014] Ideally, the positioning grooves of the embryo base and the bottleneck receiving portion are connected vertically, and a single positioning protrusion is simultaneously engaged in both the upper and lower positioning grooves.

[0015] Alternatively, the blow molding mechanism may further include: an upper die driver;

[0016] The output end of the top mold driver is connected to the air inlet pipe, and is used to drive the upper end of the air inlet pipe to rise to abut against the blank holder, so that the blank holder presses against the seat receiving part, and the annular plate presses against the bottleneck receiving part.

[0017] Optimally, the intake pipe includes: a vertical branch pipe and a horizontal branch pipe;

[0018] One end of the horizontal branch pipe is connected between the upper and lower ends of the vertical branch pipe, and the other end of the horizontal branch pipe is used to input gas; the output end of the top mold driver is connected to the lower end of the vertical branch pipe and is used to drive the vertical branch pipe to move up and down, so that the upper end of the vertical branch pipe rises to the fixed port.

[0019] Alternatively, the lower end of the fixing port may be provided with a tapered positioning part;

[0020] The inner diameter of the conical positioning part gradually decreases from low to high; the upper end of the vertical branch pipe is provided with a conical positioning platform, the outer diameter of the conical positioning platform gradually decreases from low to high; the conical positioning platform rises to abut against the conical positioning part.

[0021] A preform blow molding system includes: a conveying device and the above-mentioned preform blow molding device with positioning function;

[0022] The conveying end of the conveying device passes between the cavities of the front mold and the rear mold; the blank holders are respectively connected to the conveying end of the conveying device, and the conveying device is used to convey the blank holders between the cavities of the front mold and the rear mold.

[0023] Optimally, it may also include: a cap screwing device;

[0024] The conveying end of the conveying device passes sequentially through the preform blow molding device and the capping device;

[0025] The capping device is used to attach the cap to the mouth of the preform.

[0026] Optimally, it may also include: a cutting device;

[0027] The conveying end of the conveying device passes sequentially through the preform blow molding device, the capping device, and the cutting device;

[0028] The cutting device is used to remove the positioning bump.

[0029] Compared with the prior art, one of the above technical solutions has the following beneficial effects:

[0030] This solution provides a bottle preform blow molding device with positioning function. It uses a preform holder to fix the bottle preform, which can place the bottle preform between the bottle mouth receiving area and the inner wall of the bottle mouth receiving area and / or the inner wall of the fixing port is provided with positioning grooves, which can correspond to the positioning protrusions of the bottle preform, thereby realizing the angular positioning of the bottle preform. It can ensure that the bottle preform is formed in the mold cavity at a specific angle, and solves the problem that the bottle body of the preform cannot correspond to the contour of the bottle cap after it is demolded. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of one embodiment of the preform blow molding device;

[0032] Figure 2 yes Figure 1 Enlarged view of section A in the middle;

[0033] Figure 3 This is a cross-sectional structural schematic diagram of one embodiment of the preform blow molding device;

[0034] Figure 4 This is a schematic diagram of the structure of one embodiment of the preform;

[0035] Figure 5 This is a schematic diagram of the structure of one embodiment of the embryo base;

[0036] Figure 6 yes Figure 3 Enlarged view of section B in the middle;

[0037] Figure 7 This is a schematic diagram of one embodiment of a preform blow molding system.

[0038] in:

[0039] 1. Front mold; 2. Rear mold; 3. Mold moving mechanism; 4. Blow molding mechanism; 5. Preform; 6. Capping device; 7. Conveying device; 8. Cutting device;

[0040] Mold cavity 10; bottle body forming area 101, bottle mouth receiving area 102;

[0041] Bottleneck accommodating part 1021, seat accommodating part 1022;

[0042] 41. Embryo base; 42. Air inlet pipe; 43. Top mold driver;

[0043] Fixed opening 411, conical positioning part 412; positioning groove 40; vertical branch pipe 421, horizontal branch pipe 422; conical positioning platform 423; positioning protrusion 51; annular plate 52; bottle mouth 53. Detailed Implementation

[0044] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0045] In the description of this utility model, it should be understood that the terms "center," "longitudinal," "transverse," "length," "width," "thickness," "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," "outer," "inner side," "outer side," "inner end," "outer end," "axial," "radial," and "circumferential," etc., indicating the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, features defined with "first" and "second" may explicitly or implicitly include one or more of these features, used to distinguish descriptive features, without any order or emphasis. In the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0046] like Figure 1-7A preform blow molding device with positioning function includes: a front mold 1, a rear mold 2, a mold moving mechanism 3 and a blow molding mechanism 4;

[0047] The front mold 1 and the rear mold 2 are each provided with a mold cavity 10; the output end of the mold moving mechanism 3 is connected to the front mold 1 and is used to drive the front mold 1 to move towards the rear mold 2, so that the mold cavities 10 of the front mold 1 and the rear mold 2 are sealed and closed; the mold cavity 10 is provided with a bottle body forming area 101 and a bottle mouth receiving area 102 that are interconnected.

[0048] The blow molding mechanism 4 includes: a preform seat 41 and an air inlet pipe 42;

[0049] The preform holder 41 is provided with a fixing port 411, one end of which is used to fix the bottle mouth 53 of the preform 5; the preform holder 41 is located in the bottle mouth receiving area 102 of both the front mold 1 and the rear mold 2; the other end of the fixing port 411 is used to connect to the air inlet pipe 42.

[0050] The preform 5 is provided with a positioning protrusion 51, and the inner wall of the bottle mouth receiving area 102 and / or the inner wall of the fixing port 411 is provided with a positioning groove 40, and the positioning protrusion 51 is limited to the positioning groove 40.

[0051] This solution provides a bottle preform blow molding device with positioning function. It uses a preform seat 41 to fix the bottle preform 5, which can place the bottle preform 5 between the bottle mouth receiving area 102. The inner wall of the bottle mouth receiving area 102 and / or the inner wall of the fixing port 411 are provided with positioning grooves 40, which can correspondingly accommodate the positioning protrusions 51 of the bottle preform 5, thereby realizing the angular positioning of the bottle preform 5. It can ensure that the bottle preform 5 is formed in the mold cavity 10 at a specific angle, and solves the problem that the bottle body of the bottle preform 5 cannot correspond to the contour of the bottle cap after it is demolded.

[0052] Specifically, the front mold 1 and the rear mold 2 are each provided with a mold cavity 10, and the mold cavity 10 is provided with a bottle body forming area 101 and a bottle mouth receiving area 102. According to common knowledge, before the preform 5 is formed, its bottle mouth has an external thread structure, and the bottle body of the preform 5 is the main forming position. The bottle mouth is fixed in the bottle mouth receiving area 102. The bottle body of the preform 5 is in the bottle body forming area 101. When gas is introduced into the bottle mouth, the bottle body of the preform 5 expands, thereby forming a bottle in the bottle body forming area 101. That is, the position of the bottle mouth 53 of the preform 5 is mainly used to support the bottle body during processing. The bottle mouth receiving area 102 is used to receive the bottle mouth 53 of the preform 5. However, for the known preform 5, since the angle of the preform 5 is not placed in the bottle body forming area 101 at a specific angle, especially for the bottle that will be square after forming; the existing square bottles are randomly placed before forming. The preform 5 is placed into the bottle neck receiving area 102. The angle of the formed bottle neck is not consistent with the external thread of the bottle neck, which makes it impossible for the external thread of the bottle neck to be consistent with the bottle cap. To address this, this solution uses a preform holder 41 to fix the bottle neck 53 of the preform 5. The preform holder 41 can be placed manually between the bottle neck receiving areas 102 or transported to the bottle neck receiving areas 102 by a known conveying device. Before the front mold 1 and the rear mold 2 close together, the preform holder 41 is placed between the bottle neck receiving areas 102, and the positioning protrusion 51 of the preform 5 is aligned with the positioning groove 40 in advance. The positioning groove 40 can be set on the inner wall of the bottle neck receiving area 102 or on the inner wall of the fixing port 411. The positioning protrusion 51 is confined within the positioning groove 40, so that the position of the bottle neck 53 and the position of the bottle body of the preform 5 are positioned at a uniform angle in the mold cavity 10. At this point, the mold moving mechanism 3 is activated again. The output end of the mold moving mechanism 3 drives the front mold 1 to move relative to the rear mold 2. The mold cavities 10 of the front mold 1 and the rear mold 2 are sealed and closed. Then, gas is introduced into the air inlet pipe 42. The gas is output to the bottle preform 5 through the air inlet pipe 42 and the fixed port 411 of the preform seat 41, so that the bottle preform 5 is blow-molded and expanded. Thus, the angle of the external thread structure of the bottle mouth and the angle of the bottle body are mutually positioned by the positioning protrusion 51 and the positioning groove 40, and the forming angle of multiple bottle preforms 5 is unified. Therefore, when non-circular bottle caps are automatically installed on the bottle mouth, they only need to be rotated by the same angle to be installed on the bottle mouths of different molded bottles one by one, and it can be ensured that the bottle caps and the various sides of the bottle body are horizontally aligned in sequence, which solves the problem that the contour of the bottle body and the bottle cap cannot correspond after the bottle preform 5 is demolded.

[0053] The mold moving mechanism 3 is a known mechanism with driving and moving functions, such as a cylinder, hydraulic cylinder, or robotic arm; it only needs to drive the front mold 1 to move. Simultaneously, a known guiding structure can be used to provide linear guidance between the front mold 1 and the rear mold 2, for example... Figure 1 A guide rod is provided between the front mold 1 and the rear mold 2, and the front mold 1 moves under the action of the guide rod.

[0054] Optimally, the bottle neck receiving area 102 includes, from high to low, a bottle neck receiving portion 1021 and a seat receiving portion 1022;

[0055] The bottle neck receiving portion 1021 is provided with the positioning groove 40; the bottle preform 5 is provided with an annular plate 52 between the bottle mouth and the bottle neck, and the annular plate 52 is provided with the positioning protrusion 51; the annular plate 52 is provided in the bottle neck receiving portion 1021; the preform seat 41 is provided in the seat receiving portion 1022.

[0056] As is common knowledge, plastic bottles have an annular plate 52 between their mouth and neck, specifically located between the external thread structure of the mouth and the neck. For example, a conventional plastic bottle may have a cap above the annular plate 52, or a handle may be attached below the annular plate 52. In this solution, a positioning protrusion 51 is provided on the known annular plate 52; the bottle mouth receiving area 102 is divided into a neck bottle receiving part 1021 and a seat receiving part 1022. The neck bottle receiving part 1021 is used to receive the annular plate 52, and a positioning groove 40 is provided on the positioning protrusion 51 corresponding to the neck bottle receiving part 1021; the preform 41 drives its preform 5 to be placed between the bottle mouth receiving areas 102, the preform 41 is horizontally aligned with the seat receiving part 1022, the annular plate 52 of the preform 5 is horizontally aligned with the neck bottle receiving part 1021, and the positioning protrusion 51 is horizontally aligned with the positioning groove 40; after the mold moving mechanism 3 drives the front mold 1 and the rear mold 2 to close the mold, the positioning groove 40 is engaged with the positioning protrusion 51, thereby positioning the preform 5.

[0057] Alternatively, the embryo base 41 is provided with the positioning groove 40, and the positioning protrusion 51 of the annular plate 52 is fixed to the positioning groove 40 of both the embryo base 41 and the bottleneck receiving portion 1021.

[0058] In this embodiment, positioning grooves 40 are provided on the preform base 41 and the neck receiving part 1021 respectively. When the positioning protrusion 51 of the annular plate 52 is simultaneously engaged with the two positioning grooves 40, the preform 5, the preform base 41 and the neck receiving part 1021 are positioned simultaneously. Since the preform 5 has been placed on the preform base 41 by manual or automatic mechanical feeding before it is conveyed to the neck receiving part 1021, the preform 5 is already positioned on the preform base 41. The preform 5 and the preform base 41 are equivalent to a whole. This whole can be positioned in the positioning groove 40 of the neck receiving part 1021 by the positioning protrusion 51 on the preform 5. In this way, the angle of the preform 5 before and after molding can be kept consistent.

[0059] Alternatively, the positioning grooves 40 of the embryo base 41 and the bottleneck receiving portion 1021 are connected vertically, and a single positioning protrusion 51 is simultaneously engaged in the upper and lower positioning grooves 40.

[0060] In this embodiment, the preform 5 only needs to have a positioning protrusion 51 set at a single location. The thickness of the positioning protrusion 51 can be designed to be slightly thicker to accommodate the positioning groove 40 of the upper and lower preform seats 41 and the neck receiving part 1021. The subsequent removal of the positioning protrusion 51 is convenient, as it only needs to be removed at a single location, which simplifies the post-processing difficulty.

[0061] Alternatively, the blow molding mechanism 4 may further include: an upper die driver 43;

[0062] The output end of the top mold driver 43 is connected to the air inlet pipe 42, and is used to drive the upper end of the air inlet pipe 42 to rise to abut against the blank holder 41, so that the blank holder 41 presses against the seat receiving part 1022, and the annular plate 52 presses against the bottleneck receiving part 1021.

[0063] When the preform holder 41 is placed between the mold cavities 10, the top mold driver 43 drives the air inlet pipe 42 to rise. The air inlet pipe 42 can rise to abut against the preform holder 41, thereby limiting the angle of the preform holder 41. The preform holder 41 presses against the seat receiving part 1022, and the annular plate 52 presses against the neck receiving part 1021. The preform bottle, the preform holder 41 and the bottle mouth receiving area 102 are sequentially attached, which can maintain a compacted state during the blow molding process and improve the stability of blow molding.

[0064] Optimally, the intake pipe 42 includes: a vertical branch pipe 421 and a horizontal branch pipe 422;

[0065] One end of the horizontal branch pipe 422 is connected between the upper and lower ends of the vertical branch pipe 421, and the other end of the horizontal branch pipe 422 is used to input gas; the output end of the top mold driver 43 is connected to the lower end of the vertical branch pipe 421 and is used to drive the vertical branch pipe 421 to move up and down, so that the upper end of the vertical branch pipe 421 rises to the fixed port 411.

[0066] In this embodiment, the air inlet pipe 42 is T-shaped. One end of the horizontal branch pipe 422 is connected between the upper and lower ends of the vertical branch pipe 421, forming a T-shaped structure. The top mold actuator 43 drives the lower end of the vertical branch pipe 421 to rise and fall, causing the upper end of the vertical branch pipe 421 to rise and fall, which in turn drives the horizontal branch pipe 422 to rise and fall. The upper end of the vertical branch pipe 421 can rise to abut against the fixed port 411. The air blowing device is connected through the horizontal branch pipe 422, and the gas is output to the horizontal branch pipe 422, and then output to the interior of the preform 5 through the upper end of the vertical branch pipe 421 and the fixed port 411. In this way, the T-shaped air inlet pipe 42 simultaneously serves the functions of connecting the top mold actuator 43 and the air inlet function.

[0067] Alternatively, the lower end of the fixing port 411 may be provided with a tapered positioning part 412;

[0068] The inner diameter of the conical positioning part 412 gradually decreases from low to high; the upper end of the vertical branch pipe 421 is provided with a conical positioning platform 423, the outer diameter of the conical positioning platform 423 gradually decreases from low to high; the conical positioning platform 423 rises to abut against the conical positioning part 412.

[0069] In this design, the fixed port 411 is provided with a conical positioning part 412 at the bottom. The inner diameter of the conical positioning part 412 gradually decreases from low to high, thus forming a conical inner wall. At the same time, the upper end of the vertical branch pipe 421 is provided with a conical positioning platform 423. The outer diameter of the conical positioning platform 423 gradually decreases from low to high, thus forming a conical outer wall. In this regard, the conical positioning part 412 at the upper end of the vertical branch pipe 421 approaches the conical positioning part 412 from bottom to top. The lower end of the conical positioning part 412 is the position with the largest inner diameter, and the upper end of the conical positioning platform 423 is the position with the smallest outer diameter. Therefore, the conical positioning platform 423 can be more easily inserted into the conical positioning part 412, reducing the difficulty of fitting the air inlet pipe 42 and the embryo seat 41.

[0070] A preform blow molding system includes: a conveying device 7 and a preform blow molding device with positioning function according to any of the above embodiments;

[0071] The conveying end of the conveying device 7 passes between the mold cavities 10 of the front mold 1 and the rear mold 2; the blank holder 41 is connected to the conveying end of the conveying device 7, and the conveying device 7 is used to convey the blank holder 41 between the mold cavities 10 of the front mold 1 and the rear mold 2.

[0072] The conveying device 7 is a known mechanism with conveying function, such as a conveyor belt device, a toothed chain conveyor device, a conveyor turntable, a cylinder, a hydraulic cylinder, a robot, etc., as long as it can drive the preform 41 to move. The preform 41 is kept at a preset angle in the conveying end of the conveying device 7 and is conveyed to the mold cavity 10 between the front mold 1 and the rear mold 2. The two mold cavities 10 are closed, the bottle mouth receiving area 102 fixes the preform 5 and the preform 41, and the air inlet pipe 42 outputs gas to the fixed port 411 to blow mold the preform 5.

[0073] Optimally, it also includes: a cap screwing device 6;

[0074] The conveying end of the conveying device 7 passes sequentially through the preform blow molding device and the capping device 6;

[0075] The capping device 6 is used to install the cap onto the bottle mouth 53 of the preform 5.

[0076] The conveying device 7 can transport the preform 41 to the capping device 6; the capping device 6 is a known mechanism for installing bottle caps onto the bottle mouth 53 of the preform 5, which can be done manually or automatically. For the automatic method, according to common knowledge, the bottle cap is usually clamped by a jig, which moves to the bottle mouth, and a motor directly or indirectly drives the jig to rotate, causing the bottle cap to rotate relative to the bottle mouth. The internal thread structure of the bottle cap and the external thread structure of the bottle mouth cooperate to install the bottle cap onto the bottle mouth. In this solution, before blow molding, the angle of the external thread structure of the bottle mouth and the angle of the bottle body are positioned by the positioning protrusion 51 and the positioning groove 40. The angle of the preform 5 is uniform, and it only needs to rotate by the same angle. At the same time, for multiple non-cylindrical bottles, such as square bottles, the thread angle after molding is consistent with the direction of the square bottle. After the square bottle cap is installed at the bottle mouth, the bottle cap and the various sides of the bottle body are horizontally aligned in sequence.

[0077] Optimally, it also includes: a cutting device 8;

[0078] The conveying end of the conveying device 7 passes sequentially through the preform blow molding device 01, the capping device 6, and the cutting device 8.

[0079] The cutting device 8 is used to remove the positioning protrusion 51.

[0080] The cutting device 8 can remove the positioning protrusion 51 from the molded bottle, thereby removing the positioning protrusion 51 from the annular plate 52 without affecting the appearance after molding. The cutting device 8 is a known mechanism with a cutting function, and its cutter can remove the positioning protrusion 51. The removal can be done manually or automatically.

[0081] Although embodiments of the present invention have been shown and described, those skilled in the art will understand 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 claims and their equivalents.

Claims

1. A preform blow molding device with positioning function, characterized in that, include: Front mold, rear mold, mold moving mechanism, and blow molding mechanism; Both the front mold and the rear mold are provided with mold cavities; The output end of the mold moving mechanism is connected to the front mold and is used to drive the front mold to move towards the rear mold, so that the mold cavities of the front mold and the rear mold are sealed and closed; the mold cavity is provided with a bottle body forming area and a bottle mouth receiving area that are interconnected. The blow molding mechanism includes: a preform holder and an air inlet pipe; The preform holder is provided with a fixing port, one end of which is used to fix the bottle mouth of the preform; The preform seat is located within the bottle mouth receiving area of ​​both the front mold and the rear mold; the other end of the fixed port is used to connect to the air inlet pipe; The preform is provided with a positioning protrusion, and the inner wall of the bottle mouth receiving area and / or the inner wall of the fixing port is provided with a positioning groove, and the positioning protrusion is limited to the positioning groove.

2. The preform blow molding device with positioning function according to claim 1, characterized in that, The bottle neck receiving area, from high to low, includes: a bottle neck receiving section and a seat receiving section; The bottle neck receiving portion is provided with the positioning groove; the bottle preform is provided with an annular plate between the bottle mouth and the bottle neck, and the annular plate is provided with the positioning protrusion; the annular plate is provided in the bottle neck receiving portion; the preform seat is provided in the seat receiving portion.

3. The preform blow molding device with positioning function according to claim 2, characterized in that, The embryo base is provided with the positioning groove, and the positioning protrusion of the annular plate is fixed to the positioning groove of both the embryo base and the bottleneck receiving part.

4. The preform blow molding device with positioning function according to claim 3, characterized in that, The positioning grooves of the embryo base and the bottleneck receiving part are connected vertically, and a single positioning protrusion is simultaneously engaged in the upper and lower positioning grooves.

5. A preform blow molding device with positioning function according to claim 2, characterized in that, The blow molding mechanism further includes: a top mold driver; The output end of the top mold driver is connected to the air inlet pipe, and is used to drive the upper end of the air inlet pipe to rise to abut against the blank holder, so that the blank holder presses against the seat receiving part, and the annular plate presses against the bottleneck receiving part.

6. A preform blow molding device with positioning function according to claim 5, characterized in that, The intake pipe includes: a vertical branch pipe and a horizontal branch pipe; One end of the horizontal branch pipe is connected between the upper and lower ends of the vertical branch pipe, and the other end of the horizontal branch pipe is used to input gas; the output end of the top mold driver is connected to the lower end of the vertical branch pipe and is used to drive the vertical branch pipe to move up and down, so that the upper end of the vertical branch pipe rises to the fixed port.

7. A preform blow molding device with positioning function according to claim 6, characterized in that, The lower end of the fixing port is provided with a tapered positioning part; The inner diameter of the conical positioning part gradually decreases from low to high; the upper end of the vertical branch pipe is provided with a conical positioning platform, the outer diameter of the conical positioning platform gradually decreases from low to high; the conical positioning platform rises to abut against the conical positioning part.

8. A preform blow molding system, characterized in that, include: The conveying device and the preform blow molding device with positioning function as described in any one of claims 1-7; The conveying end of the conveying device passes between the cavities of the front mold and the rear mold; the blank holders are respectively connected to the conveying end of the conveying device, and the conveying device is used to convey the blank holders between the cavities of the front mold and the rear mold.

9. A preform blow molding system according to claim 8, characterized in that, Also includes: Screw cap device; The conveying end of the conveying device passes sequentially through the preform blow molding device and the capping device; The capping device is used to attach the cap to the mouth of the preform.

10. A preform blow molding system according to claim 9, characterized in that, Also includes: Cutting device; The conveying end of the conveying device passes sequentially through the preform blow molding device, the capping device, and the cutting device; The cutting device is used to remove the positioning bump.

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