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BUSINESS & INDUSTRY Health, Hospitality & Lifestyle

Manufacturing Method Of Plastic Dustbin Mould

$1.00

  • Manufacturing Method Of Plastic Dustbin Mould
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Description
Price : $1.00
Date : November 10, 2020
Location : ZheJiang

This experiment usesPlastic Dustbin Mould to make trash cans. Trash cans are divided into indoor trash cans and outdoor trash cans. Outdoor trash cans are generally placed on both sides of the street or road for people nearby to throw garbage. The trash in the outdoor trash can is prone to mold and odor due to long-term exposure to the air. Therefore, a cover is installed on the trash can. The cover and the body are usually connected by a shaft hole, that is, in the body of the trash can. A connecting hole is made on the upper part, and the connecting hole is connected to the lid of the barrel through a rotating shaft. Therefore, after the trash can is injection molded, the connecting hole needs to be core-pulled and demolded before the entire trash can can be taken out of the mold.

Therefore, the Chinese Patent Application No. 201120359512.9 discloses a core-pulling mechanism for the connecting hole of the lid of a plastic trash can mold, which includes an upper and lower mold plate, a fixed template under the upper and lower plate, and a cavity insert under the fixed template. A movable template is installed on the lower composite plate, and a core insert is installed on the movable template. A mold cavity is formed between the core insert and the cavity insert. There is a formed trash can in the cavity, and the trash can is made on the body There are a pair of barrel cover connection holes, the outer walls of both sides of the movable template are respectively equipped with core pulling cylinders, the piston rod of each core pulling cylinder is connected with the core pulling core, and the core pulling core passes through the movable template to match the connecting hole. In this solution, the core-pulling oil cylinder drives the core-pulling core to pull the core from the connecting hole. The structure is simple, the oil cylinder is stable and reliable, and the core-pulling is smooth.

However, due to the large wall thickness of the movable template, when the piston rod reciprocates linearly through the movable template, there will be two situations: one is contact with the hole wall on the movable template, and the resistance is large, which will increase the core pulling cylinder. Load, another situation is that the diameter of the through hole is larger than the diameter of the piston cylinder, which affects the sealing of the mold and the stability of the movement of the piston cylinder.

Another situation is to connect the core-pulling cylinder to the movable template through the bracket to expand the distance between itself and the movable template, so that the work of the piston cylinder does not enter the hole of the movable template. However, the core-pulling core will also be in operation. Encountered the same problem as the piston rod mentioned above, therefore, it is necessary to design a core pulling mechanism with low resistance, good sealing and stable operation.

In view of the deficiencies in the prior art, the purpose of this experiment is to provide a plastic trash can mold, which has a core-pulling structure with low resistance, good airtightness, and stable operation.

In order to achieve the above objectives, this experiment provides the following technical solutions: a plastic trash can mold, including a movable template, a fixed template, an upper composite plate, a lower composite plate, a cavity core block, and core pulls installed on both sides of the movable template The piston rod of the core-pulling cylinder is connected with a core-pulling core, the core-pulling core passes through the movable template and is matched with the connecting hole in the movable template, and the cylinder body of the core-pulling cylinder is fixedly connected with the outer wall of the movable template , The movable template is provided with a core-pulling hole for reciprocating the piston rod and the core-pulling core.

The core-pulling hole is divided into a core-pulling section and a piston section. The diameter of the piston section is larger than that of the core-pulling section. A supporting slider is provided at the connection between the core-pulling core and the piston rod. It is arranged coaxially with the core-pulling core and the piston rod and matched with the hole wall of the piston section, and the supporting slider abuts against the end surface of the core-pulling section and forms a sealing surface.

A core-pulling sleeve matched with the core-pulling core is welded in the movable template.

Further, the end surface of the core-pulling section is provided with a ring-shaped boss, and an end of the support slider opposite to the boss is provided with a ring-shaped groove embedded with the boss.

Further, the outer circumferential surface of the supporting slider is wrapped with a ring sleeve made of polytetrafluoroethylene material.

Further, the surface of the ring sleeve is provided with a trapezoidal groove, and the surface of the trapezoidal groove is embedded with continuous steel sheets.

By adopting the above technical solution, the core-pulling cylinder is directly connected to the movable template, which saves space, supports the setting of the sliding block, and cooperates with the hole wall of the piston section, which not only makes the reciprocating movement of the core-pulling core more stable, and avoids small The surface of the deviation itself rubs against the core-pulling section or the hole wall of the casing, reducing its surface accuracy. At the same time, it can be pressed against the end surface of the core-pulling section to ensure the sealing performance of the movable template; the setting of the casing makes the core-pulling core It has a longer distance supporting surface to improve stability.

A plastic trash can mold includes a movable template, a fixed template, an upper composite plate, a lower composite plate, a cavity core block, and core-pulling cylinders installed on the outer walls of both sides of the movable template. The piston rod of the core-pulling cylinder is connected with a core-pulling core The core-pulling core passes through the movable template to fit with the connecting hole in the movable template, the cylinder of the core-pulling cylinder is fixedly connected to the outer wall of the movable template, and the movable template is provided with a piston rod and The core is a core-pulling hole for reciprocating motion.

The core-pulling hole is divided into a core-pulling section and a piston section. The diameter of the piston section is larger than that of the core-pulling section. A supporting slider is provided at the connection between the core-pulling core and the piston rod. It is arranged coaxially with the core-pulling core and the piston rod and matched with the hole wall of the piston section, and the supporting sliding block abuts against the end surface of the core-pulling section and forms a sealing surface.

By adopting the above technical solution, the core-pulling cylinder is directly connected to the movable template, which saves space, supports the setting of the sliding block, and cooperates with the hole wall of the piston section, which not only makes the reciprocating movement of the core-pulling core more stable, and avoids small The surface of the deviation itself rubs against the core-pulling section or the hole wall of the casing, reducing its surface accuracy. At the same time, it can be pressed against the end surface of the core-pulling section to ensure the sealing performance of the movable template; the setting of the casing makes the core-pulling core It has a longer-distance supporting surface to improve stability.

A core-pulling sleeve matched with the core-pulling core is welded in the movable template.

Further, the end surface of the core-pulling section is provided with a ring-shaped boss, and an end of the support slider opposite to the boss is provided with a ring-shaped groove embedded with the boss.

Through the cooperation of the boss and the groove, the loop at this place is increased, thereby further improving the sealing performance of the movable template.

Further, the outer circumferential surface of the supporting slider is wrapped with a ring sleeve made of polytetrafluoroethylene material.

Utilizing the high lubrication performance of the PTFE material, while improving the operating stability of the core-pulling structure, it also improves the sliding properties of the supporting slider and the piston section 7, with low resistance and reducing the load of the core-pulling cylinder.

Further, the surface of the ring sleeve is provided with a trapezoidal groove, and the surface of the trapezoidal groove is embedded with continuous steel sheets.

The setting of the trapezoidal groove reduces the contact area between the surface of the ring and the hole wall on the one hand, and further reduces the resistance, and the setting of the steel sheet ensures that the setting of the trapezoidal groove will prevent the ring itself during its movement. Guarantee of structural strength.

The inverted trapezoidal ring groove is preferred, the structure is stable, and the coherent steel sheet is similar to the “V”-shaped structure, but the bottom is flat, and the structure is more stable.

The above are only the preferred embodiments of the present utility model, and the scope of protection of the present utility model is not limited to the above-mentioned embodiments. All technical solutions under the idea of the present utility model belong to the scope of protection of the utility model.

It should be pointed out that for those of ordinary skill in the art, several improvements and modifications made without departing from the principles of the present utility model should also be regarded as the protection scope of the present utility model.

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