A high efficiency material returning mechanism for a bottle blowing machine

Abstract

The utility model relates to bottle blowing machine technical field discloses a kind of efficient material withdrawal mechanism for bottle blowing machine, including bottle blowing rod, the one end of bottle blowing rod is equipped with bottle head, the air hole of bottle blowing rod and the air hole of bottle head are communicated, and the material withdrawal end of material withdrawal mechanism is set on the outer surface of bottle head.The utility model is driven by bottle blowing rod ascending to make limit plate compression spring, so that material withdrawal head and bottle mouth outer edge keep static contact, under the interaction, bottle body is forced to push out from bottle head, the process does not need manual intervention, stripping action is stable and controllable, effectively avoid the possible bottle body inclination, jam or damage problem in traditional stripping, significantly improve the success rate of stripping and production efficiency, while reducing the influence on bottle body appearance quality.

Description

Technical Field

[0001] This utility model relates to the field of blow molding machine technology, specifically to a high-efficiency material ejection mechanism for blow molding machines. Background Technology

[0002] In the plastic bottle manufacturing industry, blow molding machines are one of the key molding equipment. After the blow molding process is completed, the bottle body needs to be quickly and smoothly removed from the filling head so that it can enter the subsequent conveying or inspection process.

[0003] Traditional demolding methods often rely on the bottle's own weight falling, pneumatic blowing, or simple mechanical pushing. However, in actual production, due to the certain gap between the bottle mouth and the filling head or the vacuum adsorption effect, the bottle often has difficulty detaching smoothly, and may tilt, get stuck, or even fall and fail. In severe cases, it can also lead to bottle mouth deformation, scratches, or bottle body damage, affecting the product's appearance quality and pass rate. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency ejection mechanism for blow molding machines, which solves the problem that traditional demolding methods often rely on the bottle's own weight falling, pneumatic blowing, or simple mechanical pushing. However, in actual production, due to the certain gap between the bottle mouth and the filling head or the vacuum adsorption effect, the bottle often has difficulty detaching smoothly, and is prone to tilting, jamming, or even failure to fall. In severe cases, it can also lead to bottle mouth deformation, scratches, or bottle body damage, affecting the product's appearance quality and pass rate.

[0005] To solve the above-mentioned technical problems, this utility model is achieved through the following technical solution:

[0006] This utility model is a high-efficiency unloading mechanism for a blow molding machine, including a blow molding rod, one end of which is equipped with a bottle loading head, the air holes of the blow molding rod and the air holes of the bottle loading head are connected, and the unloading end of the unloading mechanism is disposed on the outer surface of the bottle loading head.

[0007] Furthermore, the ejection mechanism includes a mounting shell fixedly sleeved on the outer surface of the blow molding rod, a limiting plate slidably connected inside the mounting shell, and the inner surface of the limiting plate being fixedly connected to the outer surface of the blow molding rod.

[0008] Furthermore, a spring is provided between the upper surface of the limiting plate and the inner top of the mounting shell, and the two ends of the spring are fixedly connected to the limiting plate and the mounting shell respectively.

[0009] Furthermore, a threaded tube is fixedly installed on the lower surface of the mounting shell.

[0010] Furthermore, the outer surface of the threaded tube is threaded with a material ejector.

[0011] Furthermore, the ejector head is annular and surrounds the outside of the bottling head.

[0012] This utility model has the following beneficial effects:

[0013] (1) This utility model uses the rising of the blow molding rod to drive the compression spring of the limiting plate, so that the ejector head and the outer edge of the bottle mouth are in static contact. Under the interaction, the bottle body is forced out from the filling head. This process does not require manual intervention. The demolding action is smooth and controllable, effectively avoiding the bottle tilting, jamming or damage problems that may occur in traditional demolding. It significantly improves the success rate of demolding and production efficiency, while reducing the impact on the appearance quality of the bottle body.

[0014] (2) Through the threaded connection structure, the ejector head can be easily disassembled and replaced from the threaded tube, enabling the same blow molding machine to quickly adapt to the production needs of bottle types with different diameters or specifications. This design enhances the versatility of the equipment and the flexibility of the production line, reduces downtime and modification costs caused by changing bottle types. At the same time, the modular structure facilitates maintenance and component replacement, extends the service life of the equipment, and reduces long-term operating costs.

[0015] Of course, any product implementing this utility model does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0018] Figure 2 This is a schematic diagram of part of the structure of this utility model;

[0019] Figure 3 This is a schematic cross-sectional view of part of the structure of this utility model;

[0020] Figure 4 This is a partial structural breakdown diagram of the present utility model;

[0021] The attached diagram lists the components represented by each number as follows:

[0022] In the diagram: 1. Blowing rod; 2. Bottle filling head; 3. Unloading mechanism; 301. Mounting shell; 302. Limiting plate; 303. Spring; 304. Threaded tube; 305. Unloading head. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. 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.

[0024] Please see Figures 1-4 As shown, this utility model is a high-efficiency unloading mechanism for a blow molding machine, including a blow molding rod 1, a bottle loading head 2 installed at one end of the blow molding rod 1, the air hole of the blow molding rod 1 and the air hole of the bottle loading head 2 are connected, and the unloading end of the unloading mechanism 3 is set on the outer surface of the bottle loading head 2.

[0025] Blowing rod 1: Made of high-strength alloy steel, the rod body has a cylindrical hollow structure. Its internal pre-set air passage is precisely connected to the air hole of the bottle head 2 to ensure stable delivery of high-pressure gas during the blowing process. The surface of the rod body is precision ground and rust-proofed, which not only ensures the assembly accuracy with the limit plate 302 and the mounting shell 301, but also reduces friction loss during the sliding process. At the same time, it has sufficient load-bearing strength to drive the bottle head 2 to complete the reciprocating motion during the blowing and resetting process. It is the core transmission component connecting the power mechanism and the bottle head 2.

[0026] Bottle filling head 2: Made of food-grade wear-resistant rubber and hard alloy composite molding, the head has a conical structure that fits the inner wall of the preform. The outer surface is smoothed to reduce the resistance to the preform. The air holes inside are evenly distributed to ensure that the preform is subjected to uniform force in all parts during blow molding. Bottle filling head 2 and blow molding rod 1 are connected by a detachable sealed connection. A high-temperature resistant sealing ring is set at the connection to prevent high-pressure gas leakage and ensure assembly stability. It is a key bonding component that directly supports the preform and completes blow molding.

[0027] The ejection mechanism 3 includes a mounting shell 301 fixedly sleeved on the outer surface of the blow molding rod 1. A limiting plate 302 is slidably connected inside the mounting shell 301, and the inner surface of the limiting plate 302 is fixedly connected to the outer surface of the blow molding rod 1.

[0028] Mounting housing 301: Made of high-strength aluminum alloy through one-piece die casting, it has a hollow cylindrical shell structure with precision guide grooves on the inner wall to ensure the sliding fit accuracy with the limiting plate 302. Sealing end caps and connecting flanges are respectively set at the upper and lower ends of the housing. A spring mounting groove is reserved on the inner side of the upper end, and the lower end is fixedly connected to the threaded pipe 304 by welding. The outer surface of the housing has pre-set frame connection holes, which can realize the stable assembly with the blow molding machine frame, playing a core installation and protection role in bearing internal components, limiting the movement trajectory, and transmitting fixing force.

[0029] Limiting plate 302: Made of high-quality steel plate by laser cutting and CNC precision machining, it has a ring-shaped flat plate structure. The inner ring is fixedly connected to the outer surface of the blow molding rod 1 by interference fit. The connection is reinforced by welding to ensure the connection strength. The outer ring is precisely matched with the guide groove of the mounting shell 301. The sliding surface is coated with wear-resistant grease to reduce movement resistance. The upper and lower surfaces of the limiting plate 302 are respectively preset with spring positioning grooves and connecting planes, which not only ensures the stability of the spring 303 installation, but also accurately transmits the squeezing and reset forces. It is a key transmission component that connects the blow molding rod 1 and the spring 303 and realizes motion conversion and limiting.

[0030] A spring 303 is provided between the upper surface of the limiting plate 302 and the inner top of the mounting shell 301, and the two ends of the spring 303 are fixedly connected to the limiting plate 302 and the mounting shell 301 respectively.

[0031] Spring 303: Made of high-strength carbon spring steel, it is a cylindrical compression spring with electroplating anti-rust treatment on the surface. It has good elastic reset performance and fatigue strength. The two ends of the spring are ground flat to ensure tight fit with the limit plate 302 and the mounting shell 301. It is in a pre-compressed state during installation. It can provide stable buffer resistance when the blow molding rod 1 moves upward, and can quickly drive the limit plate 302 and the blow molding rod 1 to reset after the material is ejected. It is the core elastic reset component for realizing the reciprocating cycle operation of the mechanism.

[0032] A threaded tube 304 is fixedly installed on the lower surface of the mounting housing 301.

[0033] Threaded tube 304: Made of stainless steel, it has a hollow tubular structure and high-precision standard threads on its outer surface, which are precisely matched with the internal threads of the ejector head 305 to ensure the sealing and stability of the threaded connection. The upper end is fixedly connected to the lower surface of the mounting shell 301 by welding. The weld is inspected for flaws to prevent breakage under stress. The length and diameter of the threaded tube 304 are precisely calculated to ensure that the installation height of the ejector head 305 is adapted to the bottle mouth position, and to provide stable support and connection carrier for the ejector head 305. It is a key connecting component to realize the detachable assembly of the ejector head 305.

[0034] The outer surface of the threaded tube 304 is threaded with a ejector head 305.

[0035] The ejector head 305 is made of wear-resistant engineering plastic or aluminum alloy and has an annular stepped structure. The inner ring is provided with an internal thread that matches the threaded tube 304. The inner surface is polished to reduce friction damage with the outer edge of the bottle mouth. The diameter of the annular inner ring is precisely designed according to the bottle type to ensure a good fit with the outer edge of the bottle mouth. When it surrounds the outside of the filling head 2, a reasonable gap is reserved to avoid interfering with the blowing operation of the filling head 2. The thickness and strength of the ejector head 305 have been calculated to withstand the reaction force of the bottle body during ejection. At the same time, the lightweight design reduces the load on the overall mechanism. It is the core actuator that directly contacts the bottle body and realizes forced ejection.

[0036] The ejector head 305 is annular and surrounds the outside of the bottling head 2.

[0037] Working principle: After the blow molding machine completes the blow molding operation, the blow molding rod 1 drives the filling head 2 to move upward, simultaneously causing the limiting plate 302 to compress the spring 303. At this time, the ejector head 305 contacts the outer edge of the bottle mouth. Since the ejector head 305 is fixed to the frame by the mounting housing 301 and the threaded tube 304, it remains stationary. As the blow molding rod 1 continues to rise, the outer edge of the bottle mouth contacts the inner surface of the stationary annular ejector head 305 and generates an interaction force. This force prevents the bottle body from continuing to rise with the filling head 2, thereby removing the molded bottle body from the filling head. The head 2 is smoothly and forcefully pushed out, realizing automatic demolding and material ejection. After demolding is completed, the pull on the blow molding rod 1 is released, which allows the spring 303 to return to its original position. The return of the spring 303 allows the limiting plate 302 to drive the bottle loading head 2 to return to its original position via the blow molding rod 1, thus preparing for the demolding of the next bottle. By rotating the ejection head 305, the ejection head 305 can be unscrewed from the threaded tube 304, allowing ejection heads 305 of different sizes to be replaced on the mounting shell 301, thereby adapting to the demolding of bottles of different sizes.

[0038] The preferred embodiments of this utility model disclosed above are merely illustrative of the present utility model. These preferred embodiments do not exhaustively describe all details, nor do they limit the utility model to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of this utility model, thereby enabling those skilled in the art to better understand and utilize it. This utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A high-efficiency unloading mechanism for a blow molding machine, comprising a blow molding rod (1), one end of which is fitted with a bottle loading head (2), wherein the air holes of the blow molding rod (1) and the air holes of the bottle loading head (2) are connected, characterized in that: The unloading end of the unloading mechanism (3) is located on the outer surface of the bottling head (2).

2. The high-efficiency unloading mechanism for a blow molding machine according to claim 1, characterized in that: The ejection mechanism (3) includes a mounting shell (301) fixedly sleeved on the outer surface of the blow molding rod (1), and a limiting plate (302) is slidably connected inside the mounting shell (301). The inner surface of the limiting plate (302) is fixedly connected to the outer surface of the blow molding rod (1).

3. The high-efficiency unloading mechanism for a blow molding machine according to claim 2, characterized in that: A spring (303) is provided between the upper surface of the limiting plate (302) and the inner top of the mounting shell (301), and the two ends of the spring (303) are fixedly connected to the limiting plate (302) and the mounting shell (301) respectively.

4. The high-efficiency unloading mechanism for a blow molding machine according to claim 3, characterized in that: A threaded tube (304) is fixedly installed on the lower surface of the mounting housing (301).

5. The high-efficiency unloading mechanism for a blow molding machine according to claim 4, characterized in that: The outer surface of the threaded tube (304) is threaded with a material ejector (305).

6. The high-efficiency unloading mechanism for a blow molding machine according to claim 5, characterized in that: The ejector head (305) is annular and surrounds the outside of the bottling head (2).

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