Blowing mold for plastic bottle production

Abstract

The utility model relates to the field of plastic bottle production, and discloses a blowing mold for plastic bottle production, which comprises two mold main bodies, four positioning pins are fixedly connected outside the mold main bodies, a mounting plate is slidably connected among the exteriors of the four positioning pins, a fixing assembly is mounted outside the mold main bodies, and the fixing assembly is fixedly connected with the mold main bodies. A demolding assembly is mounted in the mold body, the fixing assembly comprises four fixing pins and four shells, the exteriors of the fixing pins are slidably connected to the interior of the mounting plate, the exteriors of the shells are fixedly connected to the exterior of the mold body, first springs are fixedly connected to the inner walls of the shells, and baffles are fixedly connected to the exteriors of the first springs. According to the utility model, the baffle plate compresses the spring I by shifting the shifting piece, the insertion rod is driven to be retracted into the shell to be separated from the fixed pin, and meanwhile, the stop lever automatically falls down to block the outlet of the insertion rod, so that the mold main body can be quickly matched with the positioning pin to be disassembled and assembled from the mounting plate, thereby being convenient to replace, time-saving, labor-saving and convenient to operate.

Description

Technical Field

[0001] This utility model relates to the field of plastic bottle production, and in particular to a blow molding die for plastic bottle production. Background Technology

[0002] The production of plastic bottles involves the following steps: First, a suitable plastic raw material, such as polyethylene terephthalate, is selected. Then, the raw material is heated to a molten state using injection molding or blow molding technology and injected into a mold to form a preform or directly blow molded into a bottle shape. Next, the preform is heated and expanded in the mold to form the desired plastic bottle shape. After the bottle is cooled and trimmed, it undergoes quality inspection to ensure that its strength and sealing performance meet the standards. Finally, decorative treatments such as printing and labeling are applied, and the bottle is packaged to complete the production process.

[0003] Blow molding molds are key tools used to produce hollow products such as plastic bottles and containers. Their working principle is to heat the plastic raw material to a molten state, inject it into the mold to form a preform, and then use air pressure to expand the preform into the desired shape. Blow molding molds consist of a mold core, mold cavity, mold cooling system, and gas pressurization system. Mold design needs to consider factors such as the product's shape, wall thickness uniformity, and ease of mold opening. Common types of blow molding molds include single molds and multi-mold molds, which are widely used in the production of plastic packaging products in the food, beverage, and cosmetic industries.

[0004] A blow molding die, in conjunction with a blow molding machine, injects high-pressure gas into the preform, causing it to expand and adhere to the inner wall of the mold cavity. After cooling, a complete plastic bottle is formed. However, in traditional blow molding dies, different molds need to be replaced according to different product sizes and styles. The traditional method of changing molds involves disassembly and assembly using bolts, nuts, and auxiliary tools, which is time-consuming, labor-intensive, and inefficient. Therefore, a blow molding die for plastic bottle production is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a blow molding die for plastic bottle production, which aims to improve the problem that in traditional blow molding dies, it is necessary to change to the corresponding mold according to different product sizes and styles. The traditional method of changing the mold is to disassemble and assemble it with bolts and nuts and auxiliary tools, which is time-consuming, labor-intensive and inefficient.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a blow molding mold for producing plastic bottles, comprising two mold bodies, four positioning pins fixedly connected to the outside of the mold bodies, an mounting plate slidably connected between the four positioning pins, a fixing component installed on the outside of the mold bodies, and a demolding component installed inside the mold bodies;

[0007] The fixing assembly includes four fixing pins and four housings. The fixing pins are externally slidably connected to the inside of the mounting plate. The housings are externally fixedly connected to the outside of the mold body. A spring is fixedly connected to the inner wall of the housing. A baffle is fixedly connected to the outside of the spring. A lever is fixedly connected to the inside of the baffle. A rod is fixedly connected to the outside of the baffle. A stop bar is slidably connected to the inside of the housing. A lever is fixedly connected to the inside of the stop bar.

[0008] As a further description of the above technical solution:

[0009] The demolding assembly includes multiple springs II, which are externally fixedly connected to the inside of the mold body. A sliding plate is fixedly connected between the inner sides of the multiple springs II. Limit rods are slidably connected to the upper and lower sides of the sliding plate. A push rod is fixedly connected to the inner side of the sliding plate. A top rod is fixedly connected to the inner side of the sliding plate. A top plate is fixedly connected to the inner side of the top rod.

[0010] As a further description of the above technical solution:

[0011] The baffle is externally slidably connected to the inner wall of the housing, and the paddle is externally slidably connected to the inside of the housing.

[0012] As a further description of the above technical solution:

[0013] The insertion rod is externally slidably connected to the inside of the housing, and the lever is externally slidably connected to the inside of the housing.

[0014] As a further description of the above technical solution:

[0015] The outside of the insert rod is inserted into the inside of the fixing pin, and the outside of the stop rod and the outside of the insert rod abut against each other.

[0016] As a further description of the above technical solution:

[0017] The limiting rod is externally fixedly connected to the inside of the mold body, and the sliding plate is externally slidably connected to the inside of the mold body.

[0018] As a further description of the above technical solution:

[0019] The push rod is externally slidably connected inside the mold body, with the inner side of one side of the push rod abutting against the inner side of the mold body on the other side.

[0020] As a further description of the above technical solution:

[0021] The push rod is externally slidably connected inside the mold body, and the top plate is externally slidably connected inside the mold body.

[0022] This utility model has the following beneficial effects:

[0023] 1. In this utility model, by moving the lever, the baffle is compressed by the spring, which causes the insert rod to retract into the outer shell and disengage from the fixing pin. At the same time, the baffle automatically falls down and blocks the outlet of the insert rod, which realizes that the mold body and the positioning pin can be quickly disassembled from the mounting plate, thus facilitating replacement, saving time and effort, and making operation convenient.

[0024] 2. In this utility model, by moving the two mold bodies away from each other, the spring will push the slide plate to drive the push rod and the ejector rod to pop out under the limit of the limiting rod, so that the top plate pushes the plastic bottle out of the mold body, thereby realizing rapid demolding and avoiding the plastic bottle sticking to the mold body. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of a blow molding die for producing plastic bottles according to the present invention.

[0026] Figure 2 This is a schematic diagram of the main body of a blow molding die for producing plastic bottles, as proposed in this utility model.

[0027] Figure 3 This is a schematic diagram of the structure of a fixing pin for a blow molding die used in the production of plastic bottles, as proposed in this utility model.

[0028] Figure 4 This is a schematic diagram of the insert rod of a blow molding die for producing plastic bottles, as proposed in this utility model.

[0029] Figure 5 This is a schematic diagram of the top plate of a blow molding die for producing plastic bottles, as proposed in this utility model.

[0030] Legend:

[0031] 1. Mold body; 2. Positioning pin; 3. Mounting plate; 4. Fixing pin; 5. Outer shell; 6. Spring 1; 7. Baffle; 8. Paddle; 9. Insert rod; 10. Stop rod; 11. Paddle rod; 12. Spring 2; 13. Slide plate; 14. Limiting rod; 15. Push rod; 16. Ejector rod; 17. Top plate. Detailed Implementation

[0032] 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.

[0033] Reference Figures 1-4The present invention provides an embodiment of a blow molding mold for producing plastic bottles, comprising two mold bodies 1. Four positioning pins 2 are fixedly connected to the outside of the mold body 1, and an mounting plate 3 is slidably connected between the four positioning pins 2. The mold body 1 is used to limit the size and shape of the plastic bottle. The positioning pins 2 are used to install the mold body 1 and position the mold body 1. The mounting plate 3 enables the parts on the blow molding machine to move linearly through the blow molding machine, thereby realizing the opening and closing of the mold. A fixing component is installed on the outside of the mold body 1, and a demolding component is installed inside the mold body 1.

[0034] The fixing assembly includes four fixing pins 4 and four housings 5. The fixing pins 4 are externally slidably connected to the inside of the mounting plate 3. The housings 5 ​​are externally fixedly connected to the outside of the mold body 1. A spring 6 is fixedly connected to the inner wall of the housing 5. A baffle 7 is fixedly connected to the outside of the spring 6. A lever 8 is fixedly connected to the inside of the baffle 7. A rod 9 is fixedly connected to the outside of the baffle 7. A stop rod 10 is slidably connected to the inside of the housing 5. A lever 11 is fixedly connected to the inside of the stop rod 10. The fixing pins 4, in conjunction with the rod 9, are used to fix the mold body 1 to the mounting plate 3. The housings 5 ​​are used to connect and protect the internal parts. The spring 6 is used to push the baffle 7 to move. The baffle 7 is used to withstand the thrust from the spring 6 and drive the rod 9 to move. The lever 8 is used for... To facilitate manual movement of the baffle 7, the insert rod 9 is inserted into the fixed pin 4 to keep the fixed pin 4 stable. The stop rod 10 is used to block the outlet of the insert rod 9 to prevent the insert rod 9 from automatically resetting. The lever 11 is used to facilitate manual movement of the stop rod 10. The baffle 7 is externally slidably connected to the inner wall of the outer shell 5. The lever 8 is externally slidably connected to the inside of the outer shell 5. The insert rod 9 is externally slidably connected to the inside of the outer shell 5. The lever 11 is externally slidably connected to the inside of the outer shell 5. The outer shell 5 simultaneously restricts the movement direction of the baffle 7, lever 8, insert rod 9 and lever 11. The insert rod 9 is externally inserted into the fixed pin 4 to keep the mold body 1 stable. The stop rod 10 and the insert rod 9 abut against each other to prevent the insert rod 9 from automatically resetting.

[0035] Reference Figure 2 , Figure 3 , Figure 5The demolding assembly includes multiple springs 12, which are externally fixedly connected to the inside of the mold body 1. Slide plates 13 are fixedly connected between the inner sides of the multiple springs 12. Limiting rods 14 are slidably connected to the upper and lower sides of the slide plates 13. Push rods 15 are fixedly connected to the inner side of the slide plates 13, and ejector rods 16 are fixedly connected to the inner side of the slide plates 13. An ejector plate 17 is fixedly connected to the inner side of the ejector rods 16. Springs 12 are used to push the slide plates 13 to move, and the slide plates 13 drive the ejector rods 16 to move synchronously. The limiting rods 14 restrict the direction of movement of the slide plates 13. Push rods 15 push the slide plates 13 to compress the springs 12, and ejector rods 16 drive the ejector plate 17 to move synchronously. The ejector plate 17 is used to... The plastic bottle is ejected to prevent it from adhering to the mold body 1. The limiting rod 14 is externally fixedly connected to the inside of the mold body 1 to keep the limiting rod 14 stable. The slide plate 13 is externally slidably connected to the inside of the mold body 1 to restrict the movement direction of the slide plate 13. The push rod 15 is externally slidably connected to the inside of the mold body 1 to restrict the movement direction of the push rod 15. The inner side of one push rod 15 abuts against the inner side of the mold body 1 on the other side, so that the mold body 1 on the other side pushes the push rod 15 to squeeze the slide plate 13. The ejector rod 16 is externally slidably connected to the inside of the mold body 1. The top plate 17 is externally slidably connected to the inside of the mold body 1. The mold body 1 simultaneously restricts the movement direction of the ejector rod 16 and the top plate 17.

[0036] Working principle: When producing plastic bottles, first modify the mold body 1 according to the desired bottle style. By moving the lever 8, the baffle 7 is compressed by the spring 6, causing the insert rod 9 to move synchronously and retract into the outer shell 5, disengaging from the fixing pin 4. At this time, the stop rod 10 falls due to gravity, blocking the insert rod 9 and preventing it from automatically resetting. The mold body 1 is then unlocked. Remove the mold body 1 from the mounting plate 3 and position it using the positioning pin 2. Next, move the lever 11 upwards to disengage the stop rod 10 from the insert rod 9. The spring 6 will then instantly push the baffle 7, causing the insert rod 9 to reset and re-insert into the fixing pin 4, fixing the mold body 1 onto the mounting plate 3. Blow molding can then begin. Place the preheated preform between the two mold bodies 1 and control the blow molding machine to... The mounting plate 3 moves towards the center, merging the two mold bodies 1. Simultaneously, the mold body 1 presses the push rod 15 on the opposite side, causing the sliding plate 13 to compress the second spring 12, retracting the top plate 17 into the mold body 1 until it is flush with the inner wall of the mold body 1. At this time, the blank is in the cavity between the two mold bodies 1. Air is then injected into the blank, causing it to expand and adhere to the cavity. Next, the blow molding machine is controlled to open the mold, opening the two mold bodies 1. At this time, the second spring 12 immediately pushes the sliding plate 13, which, under the limit of the limiting rod 14, causes the push rod 16 to be pushed out, driving the top plate 17 to push the plastic bottle, peeling the plastic bottle from the mold body 1, thus achieving demolding and preventing the plastic bottle from sticking to the mold body 1. This operation is convenient and labor-saving. Then, the mold body 1 is closed again to continue producing the next plastic bottle.

[0037] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A blow molding die for producing plastic bottles, comprising two die bodies (1), characterized in that: The mold body (1) is fixedly connected to four positioning pins (2) on the outside, and the four positioning pins (2) are slidably connected to an mounting plate (3) on the outside. The mold body (1) is equipped with a fixing component on the outside, and the mold body (1) is equipped with a demolding component inside. The fixing assembly includes four fixing pins (4) and four housings (5). The fixing pins (4) are externally slidably connected to the inside of the mounting plate (3). The housings (5) are externally fixedly connected to the outside of the mold body (1). A spring (6) is fixedly connected to the inner wall of the housing (5). A baffle (7) is fixedly connected to the outside of the spring (6). A lever (8) is fixedly connected to the inside of the baffle (7). A plug (9) is fixedly connected to the outside of the baffle (7). A stop bar (10) is slidably connected to the inside of the housing (5). A lever (11) is fixedly connected to the inside of the stop bar (10).

2. The blow molding die for producing plastic bottles according to claim 1, characterized in that: The demolding assembly includes multiple springs (12), which are externally fixedly connected to the inside of the mold body (1). Slide plates (13) are fixedly connected between the inner sides of the multiple springs (12). Limiting rods (14) are slidably connected to the upper and lower sides of the slide plates (13). Push rods (15) are fixedly connected to the inner side of the slide plates (13). Top rods (16) are fixedly connected to the inner side of the slide plates (13). Top plates (17) are fixedly connected to the inner side of the top rods (16).

3. The blow molding die for producing plastic bottles according to claim 1, characterized in that: The baffle (7) is externally slidably connected to the inner wall of the outer shell (5), and the paddle (8) is externally slidably connected to the inside of the outer shell (5).

4. The blow molding die for producing plastic bottles according to claim 1, characterized in that: The insert (9) is externally slidably connected to the inside of the housing (5), and the lever (11) is externally slidably connected to the inside of the housing (5).

5. A blow molding die for producing plastic bottles according to claim 1, characterized in that: The insertion rod (9) is inserted into the inside of the fixing pin (4), and the outside of the stop rod (10) and the outside of the insertion rod (9) abut against each other.

6. A blow molding die for producing plastic bottles according to claim 2, characterized in that: The limiting rod (14) is externally fixedly connected to the inside of the mold body (1), and the sliding plate (13) is externally slidably connected to the inside of the mold body (1).

7. A blow molding die for producing plastic bottles according to claim 2, characterized in that: The push rod (15) is externally slidably connected inside the mold body (1), wherein the inner side of the push rod (15) on one side abuts against the inner side of the mold body (1) on the other side.

8. A blow molding die for producing plastic bottles according to claim 2, characterized in that: The top rod (16) is externally slidably connected to the inside of the mold body (1), and the top plate (17) is externally slidably connected to the inside of the mold body (1).

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