Blowing mechanism for bottle blowing machine

Abstract

The utility model relates to the technical field of bottle blowing machine equipment, in particular to an air blowing mechanism for a bottle blowing machine, which comprises a bottle blowing forming mechanism and a bottle blowing mechanism, the plug-in sealing mechanism is fixed on the supporting frame, and one end of the plug-in sealing mechanism can be inserted into the top end opening of the mold and is sealed; and the stretching mechanism is fixed to the insertion sealing mechanism and can stretch the bottle blank during air blowing. According to the uniform blowing mechanism, in the downward moving and rotating process of the cylinder, uniform air supply to the interior of a bottle blank is achieved through the special design of the first air hole and the second air hole, the problem that due to a traditional air blowing structure, all parts of a bottle body are stressed unevenly is solved, the uniformity of the wall thickness of the bottle body is further guaranteed, and the quality and performance of the bottle are improved; and the spring can quickly pull the cylinder to return to the original position after the bottle blank is formed, so that the working efficiency of the bottle blowing machine is not influenced, and the whole bottle blowing process can be quickly and circularly carried out.

Description

Technical Field

[0001] This utility model relates to the technical field of blow molding machine equipment, specifically a blowing mechanism for blow molding machines. Background Technology

[0002] In modern industrial production, blow molding machines, as key equipment for molding plastic products, are widely used in many industries such as food, beverage, and daily chemicals. Their main function is to shape plastic bottles of various specifications and shapes from plastic granules or preforms through processes such as heating and blowing. Common types of blow molding machines include extrusion blow molding machines and injection blow molding machines. Although their working processes differ, their basic principle is the same: using air pressure to inflate softened plastic material into a mold cavity to obtain the desired bottle shape.

[0003] In the current field of blow molding machines, the blowing process is one of the core procedures, and the common blowing methods mainly fall into two categories. One method involves precisely inserting a nozzle into the preform to blow air, which directly delivers high-pressure gas into the preform, causing it to expand and deform. The other method combines blowing with a stretching rod to assist in molding. The stretching rod stretches the preform longitudinally during the blow molding process, working in conjunction with the blowing operation to ensure a more uniform distribution of plastic material. While traditional blow molding methods can achieve the molding of preforms, they have certain limitations. For example, existing blowing structures are insufficient in ensuring uniform stress on different parts of the bottle, which can easily lead to uneven bottle wall thickness, affecting the quality and performance of the bottle. Moreover, traditional structures struggle to precisely control the molding effect when dealing with blow-molded products with special shapes or high-quality requirements. Utility Model Content

[0004] The purpose of this invention is to provide a blowing mechanism for a blow molding machine to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A blowing mechanism for a blow molding machine, comprising:

[0007] Blow molding mechanism, including support frame;

[0008] The insertion sealing mechanism, fixed on the support frame, allows one end of the insertion sealing mechanism to be inserted into the top port of the mold and to perform a seal.

[0009] The stretching mechanism, fixed to the plug-in sealing mechanism, can stretch the preform during air blowing;

[0010] The uniform blowing mechanism is fixed inside the plug-in sealing mechanism and can work with the stretching mechanism to drive uniform air blowing.

[0011] A fitting limiting mechanism, fixed to the insertion sealing mechanism, can limit the movement of the gas tube along with the uniform blowing mechanism, and can seal the area to prevent gas leakage. The insertion sealing mechanism includes:

[0012] An L-shaped frame is fixedly connected to the outer wall of the support frame, and an electric push rod is fixedly connected to one end of the L-shaped frame.

[0013] A U-shaped frame is fixed to one end of an electric actuator. A conical shell is fixedly connected to one end of the U-shaped frame, and the outer wall of the conical shell is slidably inserted into the outer wall of the support frame.

[0014] The sealing ring is fixed to one end of the conical shell.

[0015] Preferably, the tensioning mechanism includes:

[0016] Electric actuator two is fixedly connected to the top wall of the conical shell, and a circular frame is fixedly connected to one end of electric actuator two;

[0017] The tension rod is fixed to the center of the bottom wall of the circular frame.

[0018] Preferably, the uniform blowing mechanism includes:

[0019] A threaded rod, one end of which is fixedly connected to the inner wall of the conical shell;

[0020] A cross is screwed onto the outer wall of a threaded rod, and a square rod is fixedly connected to each of the four ends of the cross;

[0021] A cylinder is fixed between four square rods at one end. The bottom of the cylinder has four air holes at equal angles. The bottom of the cylinder has four air holes at equal angles on the arc-shaped shell. The bottom of the cylinder has a circular hole at the center of the arc-shaped shell. The outer wall of the circular hole is slidably connected to the tension rod.

[0022] Preferably, the uniform blowing mechanism includes:

[0023] Ring frame one is slidably inserted into the inner wall of the conical shell, and the bottom wall of ring frame one is rotatably connected to the cross;

[0024] Square rod two, four in total, are fixed at equal angles to the outer wall of ring frame one;

[0025] Ring frame two is fixed between the outer walls of one end of the four square rods two, and the outer wall of ring frame two is slidably connected to the outer wall of the tension rod.

[0026] Preferably, the uniform blowing mechanism includes:

[0027] The spring is fixed between the outer wall of the ring frame and the inner wall of the conical shell.

[0028] Preferably, the pipe fitting limiting mechanism includes:

[0029] A square hole is formed on the outer wall of the conical shell. A slider is slidably inserted inside the square hole. An air tube is fixedly connected to the slider. The outer wall of the slider is fixedly connected to the outer wall of the cylinder.

[0030] The multi-stage cover has two parts, which are fixed between the outer walls on both sides of the multi-stage cover and the inner walls on both sides of the square hole.

[0031] Compared with the prior art, the beneficial effects of this utility model are:

[0032] 1. The electric actuator drives the circular frame and the stretching rod to move, stretching the preform during blowing. The stretching operation makes the plastic material more evenly distributed during the blow molding process, which helps to improve the uniformity of the bottle wall thickness and enhance the physical properties of the bottle, such as increasing the strength and stability of the bottle, making it more durable when holding liquids and other items.

[0033] 2. Through the uniform blowing mechanism, the special design of air hole one and air hole two during the downward rotation of the cylinder enables uniform air delivery to the inside of the preform, which solves the problem of uneven force on various parts of the bottle body caused by the traditional blowing structure. This further ensures the uniformity of the bottle wall thickness and improves the quality and performance of the bottle. After the preform is formed, the spring can quickly pull the cylinder back to its original position without affecting the working efficiency of the blow molding machine, so that the entire blow molding process can be carried out quickly in a cycle.

[0034] 3. The pipe limiting mechanism ensures that the air pipe moves stably with the cylinder, ensuring the stability of gas delivery during the blowing process. It is equipped with a multi-stage cover, and each outer wall is covered with a sealing gasket, which effectively prevents gas leakage from the air pipe connection, ensures the stability of the blowing pressure, improves the blowing effect and bottle blowing quality, and also reduces energy waste. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0036] Figure 2 This is a schematic diagram of the bottom structure of the conical shell in this utility model;

[0037] Figure 3 This is a schematic diagram of the internal structure of the conical shell in this utility model;

[0038] Figure 4 This is a partial structural diagram of the uniform blowing mechanism in this utility model.

[0039] In the diagram: 100, blow molding mechanism; 110, support frame; 200, plug-in sealing mechanism; 210, L-shaped frame; 211, electric actuator one; 212, U-shaped frame; 220, conical shell; 221, sealing ring; 300, tensioning mechanism; 310, electric actuator two; 311, round frame; 312, tensioning rod; 400, uniform blowing mechanism; 410, threaded rod; 411, square rod one; 412, cross; 413, cylinder; 414, air hole one; 415, air hole two; 416, round hole; 420, ring frame one; 421, square rod two; 422, ring frame two; 430, spring; 500, pipe fitting limiting mechanism; 510, square hole; 511, slider; 512, multi-stage cover. Detailed Implementation

[0040] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0041] Please see Figure 1-4 In this embodiment of the present invention, a blowing mechanism for a blow molding machine includes: a blow molding mechanism 100, which includes a support frame 110; a plug-in sealing mechanism 200 fixed to the support frame 110, which allows one end of the plug-in sealing mechanism 200 to be inserted into the top port of the mold for sealing; a stretching mechanism 300 fixed to the plug-in sealing mechanism 200, which stretches the preform during blowing; a uniform blowing mechanism 400 fixed inside the plug-in sealing mechanism 200, which works in conjunction with the stretching mechanism 300 to drive uniform blowing; and a pipe limiting mechanism 500 fixed to the plug-in sealing mechanism 200, which limits the air pipe and moves with the uniform blowing mechanism 400, and seals the pipe to prevent gas leakage. 200 includes: an L-shaped frame 210, which is fixedly connected to the outer wall of the support frame 110, and an electric push rod 211 is fixedly connected to one end of the L-shaped frame 210; a U-shaped frame 212, which is fixed to one end of the electric push rod 211, and a conical shell 220 is fixedly connected to one end of the U-shaped frame 212, the outer wall of the conical shell 220 being slidably inserted into the outer wall of the support frame 110; and a sealing ring 221, which is fixed to one end of the conical shell 220. The stretching mechanism 300 includes: an electric push rod 310, which is fixedly connected to the top wall of the conical shell 220, and a circular frame 311 is fixedly connected to one end of the electric push rod 310; and a stretching rod 312, which is fixed to the bottom wall of the circular frame 311 at the center. The circular frame 311 and the stretching rod 312 are driven to move by the electric push rod 310, and the preform is stretched during blowing.

[0042] The uniform blowing mechanism 400 includes: a threaded rod 410, one end of which is fixedly connected to the inner wall of the conical shell 220; a cross 412, which is screwed onto the outer wall of the threaded rod 410, and square rods 411 are fixedly connected to each of the four ends of the cross 412; a cylinder 413, which is fixed between one end of each of the four square rods 411, and four air holes 414 are equally spaced at the bottom of the cylinder 413; four air holes 415 are equally spaced at the bottom of the cylinder 413 on the arc-shaped shell; a circular hole 416 is located at the center of the arc-shaped shell at the bottom of the cylinder 413, and the outer wall of the circular hole 416 is slidably connected to the tension rod 312; and a ring frame 4. 20, which is slidably inserted into the inner wall of the conical shell 220, and the bottom wall of the ring frame 420 is rotatably connected to the cross 412. Square rod 421, which is provided in four and fixed at equal angles to the outer wall of the ring frame 420. Ring frame 422, which is fixed between the outer walls of one end of the four square rods 421, and the outer wall of ring frame 422 is slidably connected to the outer wall of the tension rod 312. Spring 430, which is fixed between the outer wall of the ring frame 420 and the inner wall of the conical shell 220. Through the uniform blowing mechanism 400, during the downward movement and rotation of the cylinder 413, the special design of the air hole 414 and the air hole 415 realizes uniform gas delivery to the inside of the preform.

[0043] The pipe fitting limiting mechanism 500 includes: a square hole 510, which is opened on the outer wall of the conical shell 220, and a slider 511 is slidably inserted inside the square hole 510. The slider 511 is fixedly connected to the air pipe, and the outer wall of the slider 511 is fixedly connected to the outer wall of the cylinder 413. There are two multi-stage covers 512, which are respectively fixed between the outer walls on both sides of the multi-stage cover 512 and the inner walls on both sides of the square hole 510. The pipe fitting limiting mechanism 500 can ensure that the air pipe moves stably with the cylinder 413, thus ensuring the stability of gas delivery during the blowing process.

[0044] Specifically, during operation, the insertion sealing mechanism 200 starts working, the electric push rod 211 is activated, driving the U-shaped frame 212 downward, thereby inserting one end of the conical shell 220 into the top port of the mold. At this time, the sealing ring 221 plays a sealing role to prevent gas leakage and ensure the stability of the blowing process. The stretching mechanism 300 starts working, the electric push rod 310 is fixed to the top wall of the conical shell 220, and after starting, it drives the round frame 311 downward. The stretching rod 312 is fixed at the center of the bottom wall of the round frame 311 to stretch the preform. At the same time, compressed gas is sent into the conical shell 220 through the air pipe fixed to the slider 511, which, together with the low-pressure blowing, causes the preform to be initially deformed. As the electric push rod 310 continues to drive, the round frame 311 will contact the ring frame 422. The ring frame 422 is squeezed and drives the ring frame 420 downward. The bottom wall of the ring frame 420 is rotatably connected to the cross 412, thereby driving the cross 412 and the threaded rod 410. The cylinder 413 rotates and moves downwards simultaneously. When one end of the cylinder 413 moves out of the conical shell 220 port, the outer wall of the cylinder 413 will adhere to the inner wall of one end of the conical shell 220. At this time, compressed gas will be ejected from the inside of the cylinder 413 along air hole one 414 and air hole two 415. Air hole one 414 blows air vertically downwards, and air hole two 415 blows air horizontally. The two are staggered to prevent airflow turbulence and achieve uniform gas delivery to the inside of the preform. After the preform is formed... Electric actuator 310 drives tension rod 312 back to its original position. After ring frame 422 is restricted, spring 430 rebounds and pulls cylinder 413 upward, rotating as it returns to its original position. The slider 511 of pipe limiting mechanism 500 is fixedly connected to the air pipe and is also fixedly connected to the outer wall of cylinder 413. It moves together with cylinder 413. Each layer of the multi-stage cover 512 is fitted with a sealing gasket to seal the area and ensure that gas does not leak from the air pipe connection.

[0045] Example 1

[0046] like Figure 3 As shown, in this embodiment, the tensioning mechanism 300 includes: an electric actuator 310, which is fixedly connected to the top wall of the conical shell 220, and one end of the electric actuator 310 is fixedly connected to a circular frame 311, and a tensioning rod 312, which is fixed to the bottom wall of the circular frame 311 at the center.

[0047] In this embodiment, the electric actuator 310 drives the circular frame 311 and the stretching rod 312 to move, stretching the preform during blowing. The stretching operation makes the plastic material more evenly distributed during the blow molding process, which helps to improve the uniformity of the bottle wall thickness and enhance the physical properties of the bottle, such as increasing the strength and stability of the bottle, making it more durable when holding liquids and other items.

[0048] like Figure 2-4As shown, in this embodiment, the uniform blowing mechanism 400 includes: a threaded rod 410, one end of which is fixedly connected to the inner wall of the conical shell 220; a cross 412, which is screwed onto the outer wall of the threaded rod 410, and square rods 411 are fixedly connected to each of the four ends of the cross 412; a cylinder 413, which is fixed between one end of each of the four square rods 411, and four air holes 414 are equally spaced at the bottom of the cylinder 413; four air holes 415 are equally spaced at the bottom of the cylinder 413 on the arc-shaped shell; and an air hole 415 is located at the center of the arc-shaped shell. The device includes a circular hole 416, the outer wall of which is slidably connected to the tension rod 312; a ring frame 420, which is slidably inserted into the inner wall of the conical shell 220, and the bottom wall of the ring frame 420 is rotatably connected to the cross 412; four square rods 421 are provided and fixed at equal angles to the outer wall of the ring frame 420; a ring frame 422 is fixed between the outer walls of one end of the four square rods 421, and the outer wall of the ring frame 422 is slidably connected to the outer wall of the tension rod 312; and a spring 430 is fixed between the outer wall of the ring frame 420 and the inner wall of the conical shell 220.

[0049] In practice, through the uniform blowing mechanism 400, the special design of air hole one 414 and air hole two 415 during the downward movement and rotation of the cylinder 413 enables uniform air delivery to the inside of the preform, solving the problem of uneven force on various parts of the bottle body caused by the traditional blowing structure, further ensuring the uniformity of the bottle wall thickness, and improving the quality and performance of the bottle. After the preform is formed, the spring 430 can quickly pull the cylinder 413 back to its original position without affecting the working efficiency of the blow molding machine, so that the entire blow molding process can be carried out quickly in a cycle.

[0050] Example 2

[0051] like Figure 1-2 As shown, in this embodiment, the pipe fitting limiting mechanism 500 includes: a square hole 510, which is opened on the outer wall of the conical shell 220, and a slider 511 is slidably inserted inside the square hole 510. The slider 511 is fixedly connected to an air pipe, and the outer wall of the slider 511 is fixedly connected to the outer wall of the cylinder 413. There are two multi-stage covers 512, which are respectively fixed between the outer walls of the two sides of the multi-stage cover 512 and the inner walls of the two sides of the square hole 510.

[0052] In practice, the pipe limiting mechanism 500 ensures that the air pipe moves stably along with the cylinder 413, ensuring the stability of gas delivery during the blowing process. The multi-stage cover 512 is provided, and each outer wall is covered with a sealing gasket, which effectively prevents gas from leaking from the air pipe connection, ensures the stability of the blowing pressure, improves the blowing effect and bottle blowing quality, and also reduces energy waste.

[0053] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A blowing mechanism for a blow molding machine, characterized in that, include: A blow molding mechanism (100) includes a support frame (110); A plug-in sealing mechanism (200) is fixed on a support frame (110); The tensioning mechanism (300) is fixed to the insertion sealing mechanism (200); The uniform blowing mechanism (400) is fixed inside the plug-in sealing mechanism (200); A fitting limiting mechanism (500) is fixed to a plug-in sealing mechanism (200), the plug-in sealing mechanism (200) comprising: The L-shaped frame (210), U-shaped frame (212), and sealing ring (221) are fixedly connected to the outer wall of the support frame (110). One end of the L-shaped frame (210) is fixedly connected to an electric push rod (211). The U-shaped frame (212) is fixed at one end of the electric push rod (211). One end of the U-shaped frame (212) is fixedly connected to a conical shell (220). The outer wall of the conical shell (220) is slidably inserted into the outer wall of the support frame (110). The sealing ring (221) is fixed at one end of the conical shell (220).

2. The blowing mechanism for a blow molding machine according to claim 1, characterized in that, The tensioning mechanism (300) includes: Electric actuator 2 (310) is fixedly connected to the top wall of the conical shell (220), and a circular frame (311) is fixedly connected to one end of electric actuator 2 (310); The tension rod (312) is fixed to the bottom wall of the circular frame (311) at the center.

3. The blowing mechanism for a blow molding machine according to claim 2, characterized in that, The uniform blowing mechanism (400) includes: The threaded rod (410) is fixedly connected at one end to the inner wall of the conical shell (220); A cross (412) is screwed onto the outer wall of a threaded rod (410), and a square rod (411) is fixedly connected to each of the four ends of the cross (412); A cylinder (413) is fixed between one end of four square rods (411). Four air holes (414) are opened at equal angles at the bottom of the cylinder (413). Four air holes (415) are opened at equal angles at the bottom of the cylinder (413) on the arc-shaped shell. A circular hole (416) is opened at the center of the arc-shaped shell at the bottom of the cylinder (413). The outer wall of the circular hole (416) is slidably connected to the tension rod (312).

4. The blowing mechanism for a blow molding machine according to claim 3, characterized in that, The uniform blowing mechanism (400) includes: Ring frame 1 (420) is slidably inserted into the inner wall of conical shell (220), and the bottom wall of ring frame 1 (420) is rotatably connected to cross (412); Square rod two (421) is provided in four parts, and is fixed at equal angles to the outer wall of ring frame one (420); Ring frame two (422) is fixed between the outer walls of one end of four square rods two (421), and the outer wall of ring frame two (422) is slidably connected to the outer wall of tension rod (312).

5. The blowing mechanism for a blow molding machine according to claim 4, characterized in that, The uniform blowing mechanism (400) includes: Spring (430) is fixed between the outer wall of ring frame (420) and the inner wall of conical shell (220).

6. The blowing mechanism for a blow molding machine according to claim 5, characterized in that, The pipe fitting limiting mechanism (500) includes: A square hole (510) is opened on the outer wall of the conical shell (220). A slider (511) is slidably inserted inside the square hole (510). An air tube is fixedly connected to the slider (511). The outer wall of the slider (511) is fixedly connected to the outer wall of the cylinder (413). There are two multi-level covers (512), which are fixed between the outer walls on both sides of the multi-level cover (512) and the inner walls on both sides of the square hole (510).

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