Bottle blowing female die with bottle type structure easy to replace

Abstract

The utility model discloses a bottle blowing female die with a bottle-shaped structure easy to replace. The bottle blowing female die comprises a left die, a right die and a bottom die, the left mold comprises a left female mold, a left connecting mold and a left sub-mold; the right mold comprises a right female mold, a right connecting mold and a right sub-mold; and the bottom die is arranged below the left die and the right die and is matched with the left bottle body concave cavity of the left sub-die and the right bottle body concave cavity of the right sub-die to form a blow molding inner cavity. The bottle blowing female mold with the bottle-shaped structure easy to replace is provided with the left mold, the right mold and the bottom mold, and the left mold and the right mold are provided with mutually separated structures, so that the modularization of a blowing mold is realized. A manufacturer only needs to configure a small number of left female dies and right female dies and configure corresponding left connecting dies, left sub-dies, right connecting dies and right sub-dies for bottles and barrels with different shapes. The cost for preparing the left connecting mold, the left sub-mold, the right connecting mold and the right sub-mold is lower than the cost of the whole mold, so that the purchase cost of the mold can be greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of blow molding molds, in particular to a bottle blowing mother mold with an easy-to-replace bottle shape structure. Background Art

[0002] In daily life, plastic bottles for containing liquids such as water and oil are widely used in consumers' daily lives, greatly facilitating people's lives. Existing plastic bottles are produced through an in-mold blowing process.

[0003] The general production process for plastic bottles is as follows: a molten tube is extruded from the discharge port, where it grows downward. The left and right molds are then joined together, creating a predetermined internal cavity. The left and right molds sandwich the tube. A blow needle in the center of the discharge port then blows air into the tube, causing it to expand and eventually fit within the mold cavity. The left and right molds are equipped with liquid cooling channels, allowing the tube to cool and set its shape. The left and right molds are then separated, allowing the semi-finished plastic bottle to be removed.

[0004] However, existing molds are generally single-cavity or multi-cavity, and the bottle shape is fixed. When the bottle shape needs to be changed, the entire set of molds needs to be replaced. The assembly and disassembly of the molds during the replacement process on the bottle blowing equipment is very time-consuming, which not only increases the manufacturing cost, but also increases the labor intensity of workers. Utility Model Content

[0005] The purpose of the utility model is to provide a bottle blowing mother mold with an easy-to-replace bottle shape structure, so as to solve the problem that the entire set of molds needs to be replaced from the bottle blowing equipment when changing the bottle shape in the existing molds.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] The utility model provides a bottle blowing mother mold with an easy-to-change bottle shape structure, comprising a left mold, a right mold and a bottom mold;

[0008] The left mold includes a left mother mold, a left connecting mold and a left sub-mold; a first mounting cavity is provided on the inner side of the left mother mold, a second mounting cavity is provided on the inner side of the left connecting mold; a left bottle body concave cavity is provided on the inner side of the left sub-mold, the left connecting mold is embedded in the first mounting cavity and is detachably connected to the left mother mold, and the left sub-mold is embedded in the second mounting cavity and is detachably connected to the left connecting mold;

[0009] The right mold includes a right mother mold, a right connecting mold and a right sub-mold; a third mounting cavity is provided on the inner side of the right mother mold, and a fourth mounting cavity is provided on the inner side of the right connecting mold; a right bottle body concave cavity is provided on the inner side of the right sub-mold, the right connecting mold is embedded in the third mounting cavity and is detachably connected to the right mother mold, and the right sub-mold is embedded in the fourth mounting cavity and is detachably connected to the right connecting mold;

[0010] The bottom mold is arranged below the left mold and the right mold, and cooperates with the left bottle body concave cavity and the right bottle body concave cavity to form a blow molding inner cavity.

[0011] In the bottle blowing mother mold with an easily replaceable bottle shape structure, two or more first fixing notches are provided on both the front and rear sides of the first mounting cavity, and second fixing notches are provided on both the front and rear sides of the second mounting cavity, the number and positions of which match those of the first fixing notches.

[0012] Each of the first fixing notches is provided with a first fixing screw hole and a first fixing assembly, the first fixing assembly includes a first fixing piece and a first fixing block, the first fixing block is provided with a first through hole, the first fixing piece passes through the first through hole and is threadedly connected to the first fixing screw hole, and the end of the first fixing block away from the first through hole extends into the second fixing notch and is tightly against the second fixing notch;

[0013] Two or more third fixing notches are provided on the front and rear sides of the third mounting cavity, and fourth fixing notches are provided on the front and rear sides of the fourth mounting cavity, the number and position of which are compatible with the third fixing notches; the third fixing notches are provided with third fixing screw holes and second fixing components, and the structure of the second fixing components is the same as that of the first fixing components.

[0014] In the bottle blowing mother mold with an easily replaceable bottle shape structure, two or more first limiting notches are provided on both the front and rear sides of the second mounting cavity, and second limiting notches are provided on both the front and rear sides of the left bottle body concave cavity, the number and positions of which match those of the first limiting notches.

[0015] Each of the first limiting notches is provided with a first limiting screw hole and a first limiting assembly, the first limiting assembly includes a first limiting member and a first limiting block, the first limiting block is provided with a second through hole, the first limiting member passes through the second through hole and is threadedly connected to the first limiting screw hole, and one end of the first limiting block away from the second through hole extends into the second limiting notch and is tightly against the second limiting notch;

[0016] Two or more third limiting notches are provided on the front and rear sides of the fourth mounting cavity, and fourth limiting notches are provided on the front and rear sides of the right bottle body concave cavity, the number and position of which are compatible with the first limiting notches; the third limiting notches are provided with a third limiting screw hole and a second limiting component, and the structure of the second limiting component is the same as that of the first limiting component.

[0017] In the bottle blowing mother mold with an easy-to-replace bottle shape structure, two or more mold clamping protrusions are provided on the inner side of the left sub-mold, and the mold clamping protrusions are distributed on the front and back sides; the inner side of the right sub-mold is provided with mold clamping holes, and the number and positions of the mold clamping holes are adapted to the mold clamping protrusions. When the left mold and the right mold are combined with each other, the mold clamping protrusions are inserted into the mold clamping holes.

[0018] In the bottle blowing mother mold with an easily replaceable bottle shape structure, the left connecting mold and the right connecting mold have the same structure, including a connecting mold body and an insert block;

[0019] The plug block includes an integrally formed fitting portion and a connecting portion; the connecting mold body is provided with a mounting hole that is adapted to the shape and size of the plug block, and a convex edge is provided on the outer side of the mounting hole; the left mother mold and the right mother mold are both provided with plug-in through holes that are adapted to the shape and size of the connecting portion; the connecting portion passes through the mounting hole and is inserted into the plug-in through holes; the side of the fitting portion close to the connecting portion is tightly against the convex edge, and the side of the fitting portion away from the connecting portion cooperates with the inner side surface of the connecting mold body to form a second mounting cavity or a third mounting cavity.

[0020] In the bottle blowing mother mold with an easy-to-change bottle shape structure, both the front and rear sides of the left mold and the front and rear sides of the right mold are provided with limiting grooves, and the limiting grooves are used for fixed connection with the blow molding equipment.

[0021] The bottle blowing mother mold with an easy-to-replace bottle shape structure also includes a top mold, which includes a left top module and a right top module; the left top module is detachably mounted on the top of the left sub-mold, and the right top module is detachably mounted on the top of the right sub-mold, and the left top module is provided with a left air avoidance gap, and the right top module is provided with a right air avoidance gap. When the left mold and the right mold are combined with each other, the left air avoidance gap and the right air avoidance gap cooperate to form a blow molding through hole.

[0022] A technical solution in the present invention can have the following beneficial effects:

[0023] The blow molding mother mold, which allows for easily interchangeable bottle shapes, comprises a left mold, a right mold, and a bottom mold. The left and right molds are separated from each other, achieving modular blow molding. Manufacturers only need to equip a relatively small number of left and right mother molds, and can then configure corresponding left connecting molds, left sub-molds, right connecting molds, and right sub-molds for different bottle barrel shapes. Because the cost of preparing the left connecting mold, left sub-mold, right connecting mold, and right sub-mold is lower than the cost of the entire mold, this can significantly save on mold purchases.

[0024] Furthermore, in many cases, portions of the left and right connecting molds used for bottles and barrels of different shapes can be shared, further reducing mold purchase costs. Furthermore, when the left or right sub-mold needs repair, it can simply be replaced with an identical spare sub-mold. Furthermore, replacing the left connecting mold, left sub-mold, right connecting mold, and right sub-mold is much easier than replacing existing monolithic molds. This reduces worker workload and production downtime, significantly shortening the time required for mold replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic structural diagram of one embodiment of the present utility model;

[0026] Figure 2 This is a structural diagram of the left mold in one embodiment of the present utility model;

[0027] Figure 3 This is a structural diagram of the right mold in one embodiment of the present utility model;

[0028] Figure 4 This is a schematic diagram of the connection between the left mother mold and the left connecting mold in one embodiment of the present invention;

[0029] Figure 5 This is a structural diagram of the left mother mold in one embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the connection between the left mother mold, the left connecting mold and the left sub-mold in one embodiment of the present invention;

[0031] In the accompanying drawings: left mold 1, right mold 2, bottom mold 3; limit groove 4; top mold 5;

[0032] Left mother mold 11, left connecting mold 12, left sub-mold 13; right mother mold 21, right connecting mold 22, right sub-mold 23; left top module 51, right top module 52; blow molding through hole 50

[0033] Connecting mold body 101, insert block 102; plug-in through hole 103; first mounting cavity 110; first fixing notch 111; first fixing member 112, first fixing block 113; second mounting cavity 120; second fixing notch 121; first limiting notch 122; first limiting screw hole 123; first limiting member 124, first limiting block 125; left bottle body cavity 130; second limiting notch 131; mold clamping protrusion 132; third fixing notch 201; fourth fixing notch 202; second fixing assembly 203; third limiting notch 204, fourth limiting notch 205; right bottle body cavity 230, mold clamping hole 231;

[0034] Fitting portion 1021 and connecting portion 1022 . DETAILED DESCRIPTION

[0035] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0036] In the description of the present invention, it should be understood that the terms "longitudinal", "transverse", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings and are only used to facilitate the description of the present invention and simplify the description. They do not indicate or imply that the devices or elements referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limitations on the present invention. In addition, features defined as "first" or "second" may explicitly or implicitly include one or more such features, and are used to distinguish between the described features without distinction of order or importance.

[0037] In the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0039] Please refer to Figures 1 to 6 The utility model provides a bottle blowing mother mold with an easy-to-replace bottle shape structure, comprising a left mold 1, a right mold 2 and a bottom mold 3;

[0040] The left mold 1 includes a left mother mold 11, a left connecting mold 12, and a left sub-mold 13; a first mounting cavity 110 is provided on the inner side of the left mother mold 11, a second mounting cavity 120 is provided on the inner side of the left connecting mold 12; a left bottle body concave cavity 130 is provided on the inner side of the left sub-mold 13; the left connecting mold 12 is embedded in the first mounting cavity 110 and is detachably connected to the left mother mold 11; the left sub-mold 13 is embedded in the second mounting cavity 120 and is detachably connected to the left connecting mold 12;

[0041] The right mold 2 includes a right mother mold 21, a right connecting mold 22, and a right sub-mold 23. The inner side of the right mother mold 21 is provided with a third mounting cavity, and the inner side of the right connecting mold 22 is provided with a fourth mounting cavity. The inner side of the right sub-mold 23 is provided with a right bottle body concave cavity 230. The right connecting mold 22 is embedded in the third mounting cavity and is detachably connected to the right mother mold 21. The right sub-mold 23 is embedded in the fourth mounting cavity and is detachably connected to the right connecting mold 22.

[0042] The bottom mold 3 is arranged below the left mold 1 and the right mold 2 and cooperates with the left bottle body cavity 130 and the right bottle body cavity 230 to form a blow molding inner cavity.

[0043] The bottle blowing mother mold with an easy-to-replace bottle shape structure is provided with a left mold 1, a right mold 2 and a bottom mold 3. The left mold 1 includes a left mother mold 11, a left connecting mold 12 and a left sub-mold 13, and the right mold 2 includes a right mother mold 21, a right connecting mold 22 and a right sub-mold 23. The left mold 1 is provided with a structure that is separated from each other. Similarly, the right mold 2 is provided with a structure that is separated from each other, thereby realizing the modularization of the blow molding mold.

[0044] Manufacturers only need to equip a relatively small number of left mother molds 11 and right mother molds 21, and configure corresponding left connecting molds 12, left sub-molds 13, right connecting molds 22, and right sub-molds 23 for bottles and barrels of different shapes. Since the cost of preparing the left connecting mold 12, left sub-mold 13, right connecting mold 22, and right sub-mold 23 is lower than the cost of the entire mold, this can significantly save mold purchase costs.

[0045] In many cases, parts of the left connecting mold 12 and right connecting mold 22 can be shared between bottles and barrels of different shapes, further reducing mold purchase costs. Furthermore, when the left sub-mold 13 or right sub-mold 23 needs repair, it can simply be replaced with an identical spare sub-mold. Furthermore, replacing the left connecting mold 12, left sub-mold 13, right connecting mold 22, and right sub-mold 23 is much easier than replacing existing monolithic molds. This reduces worker workload and production downtime, significantly shortening the time required for mold replacement.

[0046] Specifically, two or more first fixing notches 111 are provided on both the front and rear sides of the first installation cavity 110, and second fixing notches 121 are provided on both the front and rear sides of the second installation cavity 120, the number and position of which are adapted to the first fixing notches 111;

[0047] Each of the first fixing notches 111 is provided with a first fixing screw hole and a first fixing assembly. The first fixing assembly includes a first fixing member 112 and a first fixing block 113. The first fixing block 113 is provided with a first through hole. The first fixing member 112 passes through the first through hole and is threadedly connected to the first fixing screw hole. An end of the first fixing block 113 away from the first through hole extends into the second fixing notch 121 and is tightly against the second fixing notch 121.

[0048] Two or more third fixing notches 201 are provided on the front and rear sides of the third installation cavity, and fourth fixing notches 202 are provided on the front and rear sides of the fourth installation cavity, the number and position of which are adapted to the third fixing notches 201; each of the third fixing notches 201 is provided with a third fixing screw hole and a second fixing component 203, and the structure of the second fixing component 203 is the same as that of the first fixing component.

[0049] With this structure, the left mother mold 11 secures the left connecting mold 12 within the first mounting cavity 110 via the first fixing components on either side, which engage with the first fixing notches 111 and the second fixing notches 121. This prevents longitudinal movement of the left connecting mold 12, preventing it from shifting during the blow molding process, which could cause the left sub-mold 13 to follow the left connecting mold 12 and affect the shape of the plastic bottle. The first fixing members 112 are specifically bolts, resulting in a simple structure that facilitates installation and removal of the left connecting mold 12.

[0050] The right mother mold 21 has the same structure as the left mother mold 11. Similarly, the right connecting mold 22 is fixed in the third installation cavity by cooperating with the second fixing component 203 and the third fixing notch 201 and the fourth fixing notch 202, which will not be described in detail here.

[0051] Specifically, two or more first limiting notches 122 are provided on both the front and rear sides of the second mounting cavity 120, and second limiting notches 131 are provided on both the front and rear sides of the left bottle body cavity 130, the number and positions of which match those of the first limiting notches 122.

[0052] Each of the first limiting notches 122 is provided with a first limiting screw hole 123 and a first limiting assembly. The first limiting assembly includes a first limiting member 124 and a first limiting block 125. The first limiting block 125 is provided with a second through hole. The first limiting member 124 passes through the second through hole and is threadedly connected to the first limiting screw hole 123. An end of the first limiting block 125 away from the second through hole extends into the second limiting notch 131 and abuts against the second limiting notch 131.

[0053] Two or more third limiting notches 204 are provided on the front and rear sides of the fourth mounting cavity, and fourth limiting notches 205 are provided on the front and rear sides of the right bottle body cavity 230, the number and position of which are adapted to the first limiting notches 122; the third limiting notches 204 are each provided with a third limiting screw hole and a second limiting component 206, and the structure of the second limiting component 206 is the same as that of the first limiting component.

[0054] With the above structure, the left connecting mold 12 cooperates with the first limiting notch 122 and the second limiting notch 131 on both sides to fix the left sub-mold 13 in the second mounting cavity 120. The structure of the first limiting component is the same as that of the first fixing component. Similarly, it can prevent the left sub-mold 13 from shifting during the blow molding process, thereby affecting the shape of the plastic bottle.

[0055] The right connecting mold 22 has the same structure as the left connecting mold 12. Similarly, the right sub-mold 23 is fixed in the fourth mounting cavity by cooperating with the second limiting component 206 and the third limiting notch 204 and the fourth limiting notch 205, which will not be described in detail here.

[0056] Specifically, two or more mold clamping protrusions 132 are provided on the inner side of the left sub-mold 13, and the mold clamping protrusions 132 are distributed on the front and back sides; the inner side of the right sub-mold 23 is provided with mold clamping holes 231, and the number and position of the mold clamping holes 231 are adapted to the mold clamping protrusions 132. When the left mold 1 and the right mold 2 are combined with each other, the mold clamping protrusions 132 are inserted into the mold clamping holes 231.

[0057] The above structure is used to assist the left sub-mold 13 and the right sub-mold 23 in alignment and positioning when the mold is closed. The cooperation between the two can ensure the precise docking of the molds when the mold is closed, thereby ensuring the accuracy and quality of the molded product.

[0058] Preferably, the left connecting mold 12 and the right connecting mold 22 have the same structure, including a connecting mold body 101 and an insert block 102;

[0059] The plug block 102 includes an integrally formed engaging portion 1021 and a connecting portion 1022; the connecting mold body 101 is provided with a mounting hole that is adapted to the shape and size of the plug block 102, and a convex edge is provided on the outer side of the mounting hole. The left mother mold 11 and the right mother mold 21 are both provided with a plug-in through hole 103 that is adapted to the shape and size of the connecting portion 1022. The connecting portion 1022 passes through the mounting hole and is inserted into the plug-in through hole 103. The side of the engaging portion 1021 close to the connecting portion 1022 is tightly against the convex edge, and the side of the engaging portion 1021 away from the connecting portion 1022 cooperates with the inner side surface of the connecting mold body 101 to form a second mounting cavity 120 or a third mounting cavity.

[0060] Since the outer wall of the left connecting mold 12 fits with the first mounting cavity 110 and the outer wall of the right connecting mold 22 fits with the third mounting cavity, when replacing the left connecting mold 12 and the right connecting mold 22, it is difficult to directly remove the left connecting mold 12 from the first mounting cavity 110 or the right connecting mold 22 from the third mounting cavity. With the above structure, the staff can use the insert block 102 to push the left connecting mold 12 out of the first mounting cavity 110 or push the right connecting mold 22 out of the third mounting cavity, which can further improve the replacement efficiency and reduce the work intensity of the staff.

[0061] Optionally, both the front and rear sides of the left mold 1 and the front and rear sides of the right mold 2 are provided with limiting grooves 4, and the limiting grooves 4 are used for fixed connection with the blow molding equipment.

[0062] The above structure, through the stop groove 4, ensures precise alignment and stability of the entire mold on the blow molding equipment, allowing the mold to maintain the correct relative position during assembly and mold closing, reducing processing errors and improving molding accuracy. Furthermore, the stop groove 4 enhances the durability of the mold and prevents displacement or loosening during operation.

[0063] Specifically, it also includes a top mold 5, which includes a left top module 51 and a right top module 52; the left top module 51 is detachably mounted on the top of the left sub-mold 13, and the right top module 52 is detachably mounted on the top of the right sub-mold 23. The left top module 51 is provided with a left air avoidance gap, and the right top module 52 is provided with a right air avoidance gap. When the left mold 1 and the right mold 2 are combined with each other, the left air avoidance gap and the right air avoidance gap cooperate to form a blow molding through hole 50.

[0064] The top mold 5 is composed of a left top module 51 and a right top module 52. The blow molding through-hole 50 provides access to the blow molding cavity for the blow molding machine's discharge port and the material pipe. Furthermore, the top mold 5 ensures uniformity and stability during the molding of the plastic bottle, preventing deformation of the workpiece due to uneven pressure.

[0065] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and should not be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will be able to devise other specific embodiments of the present invention without inventive effort, and such equivalent variations or substitutions are encompassed within the scope of the claims of this application.

Claims

1. A bottle blowing mother mold with easy-to-change bottle shape structure, characterized in that: Including left mold, right mold and bottom mold; The left mold includes a left mother mold, a left connecting mold and a left sub-mold; a first mounting cavity is provided on the inner side of the left mother mold, a second mounting cavity is provided on the inner side of the left connecting mold; a left bottle body concave cavity is provided on the inner side of the left sub-mold, the left connecting mold is embedded in the first mounting cavity and is detachably connected to the left mother mold, and the left sub-mold is embedded in the second mounting cavity and is detachably connected to the left connecting mold; The right mold includes a right mother mold, a right connecting mold and a right sub-mold; a third mounting cavity is provided on the inner side of the right mother mold, and a fourth mounting cavity is provided on the inner side of the right connecting mold; a right bottle body concave cavity is provided on the inner side of the right sub-mold, the right connecting mold is embedded in the third mounting cavity and is detachably connected to the right mother mold, and the right sub-mold is embedded in the fourth mounting cavity and is detachably connected to the right connecting mold; The bottom mold is arranged below the left mold and the right mold, and cooperates with the left bottle body concave cavity and the right bottle body concave cavity to form a blow molding inner cavity.

2. The bottle blowing mother mold with an easily replaceable bottle shape structure according to claim 1, characterized in that: Two or more first fixing notches are provided on both the front and rear sides of the first installation cavity, and second fixing notches are provided on both the front and rear sides of the second installation cavity, the number and position of which are compatible with the first fixing notches; Each of the first fixing notches is provided with a first fixing screw hole and a first fixing assembly, the first fixing assembly includes a first fixing piece and a first fixing block, the first fixing block is provided with a first through hole, the first fixing piece passes through the first through hole and is threadedly connected to the first fixing screw hole, and the end of the first fixing block away from the first through hole extends into the second fixing notch and is tightly against the second fixing notch; Two or more third fixing notches are provided on the front and rear sides of the third mounting cavity, and fourth fixing notches are provided on the front and rear sides of the fourth mounting cavity, the number and position of which are compatible with the third fixing notches; the third fixing notches are provided with third fixing screw holes and second fixing components, and the structure of the second fixing components is the same as that of the first fixing components.

3. The bottle blowing mother mold with an easily replaceable bottle shape structure according to claim 1, characterized in that: Two or more first limiting notches are provided on both the front and rear sides of the second mounting cavity, and second limiting notches are provided on both the front and rear sides of the left bottle body cavity, the number and positions of which match those of the first limiting notches; Each of the first limiting notches is provided with a first limiting screw hole and a first limiting assembly, the first limiting assembly includes a first limiting member and a first limiting block, the first limiting block is provided with a second through hole, the first limiting member passes through the second through hole and is threadedly connected to the first limiting screw hole, and one end of the first limiting block away from the second through hole extends into the second limiting notch and is tightly against the second limiting notch; Two or more third limiting notches are provided on the front and rear sides of the fourth mounting cavity, and fourth limiting notches are provided on the front and rear sides of the right bottle body concave cavity, the number and position of which are compatible with the first limiting notches; the third limiting notches are provided with a third limiting screw hole and a second limiting component, and the structure of the second limiting component is the same as that of the first limiting component.

4. The bottle blowing mother mold with an easily replaceable bottle shape structure according to claim 1, characterized in that: The inner side of the left sub-mold is provided with two or more mold-closing protrusions, and the mold-closing protrusions are distributed on the front and back sides; the inner side of the right sub-mold is provided with mold-closing holes, and the number and position of the mold-closing holes are adapted to the mold-closing protrusions. When the left mold and the right mold are combined with each other, the mold-closing protrusions are inserted into the mold-closing holes.

5. The bottle blowing mother mold with an easily replaceable bottle shape structure according to claim 1, characterized in that: The left connecting mold and the right connecting mold have the same structure, including a connecting mold body and an insert block; The plug block includes an integrally formed fitting portion and a connecting portion; the connecting mold body is provided with a mounting hole that is adapted to the shape and size of the plug block, and a convex edge is provided on the outer side of the mounting hole; the left mother mold and the right mother mold are both provided with plug-in through holes that are adapted to the shape and size of the connecting portion; the connecting portion passes through the mounting hole and is inserted into the plug-in through holes; the side of the fitting portion close to the connecting portion is tightly against the convex edge, and the side of the fitting portion away from the connecting portion cooperates with the inner side surface of the connecting mold body to form a second mounting cavity or a third mounting cavity.

6. The bottle blowing mother mold with an easily replaceable bottle shape structure according to claim 1, characterized in that: The front and rear sides of the left mold and the front and rear sides of the right mold are both provided with limiting grooves, and the limiting grooves are used for fixed connection with the blow molding equipment.

7. The bottle blowing mother mold with an easily replaceable bottle shape structure according to claim 1, characterized in that: It also includes a top mold, which includes a left top module and a right top module; the left top module is detachably mounted on the top of the left sub-mold, and the right top module is detachably mounted on the top of the right sub-mold, and the left top module is provided with a left air avoidance gap, and the right top module is provided with a right air avoidance gap. When the left mold and the right mold are combined with each other, the left air avoidance gap and the right air avoidance gap cooperate to form a blow molding through hole.

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