CN118181641B

CN118181641B - Efficient processing and forming method for plastic cutlery box

Info

Publication number: CN118181641B
Application number: CN202410612608.3A
Authority: CN
Inventors: 金蕾蕾; 姚瑞林
Original assignee: Cangzhou Huifeng Technology Co ltd
Current assignee: Cangzhou Huifeng Technology Co ltd
Priority date: 2024-05-17
Filing date: 2024-05-17
Publication date: 2024-08-20
Anticipated expiration: 2044-05-17
Also published as: CN118181641A

Abstract

The invention provides a high-efficiency processing and forming method of a plastic cutlery box, which belongs to the technical field of plastic processing and comprises the following steps: and respectively installing the first dies with various specifications and the corresponding second dies with various specifications on the first driving roller and the second driving roller. In the process of reversely rotating the first driving roller and the second driving roller, the first die is buckled with the corresponding second die and is enclosed as a die cavity. After the feedstock is metered out of the extrusion head into the die cavity, the first die is separated from the first drive roller, and both the first die and the second die are positioned on the second drive roller. And taking out the finished plastic cutlery box after the raw materials are cooled and shaped in the die cavity, and reinstalling the first die on the first driving roller. According to the efficient processing and forming method for the plastic cutlery box, provided by the invention, the processing efficiency of the plastic cutlery box can be improved and the processing cost can be reduced through the cooperation of the first die and the second die.

Description

Efficient processing and forming method for plastic cutlery box

Technical Field

The invention belongs to the technical field of plastic processing, and particularly relates to a high-efficiency processing and forming method of a plastic cutlery box.

Background

As people's lives, cultures become colorful and complicated with industry development, various types of disposable tableware have been developed, including spoons, cups, plates, lunch baskets and other disposable living necessities, in order to save time. The application of the disposable tableware brings convenience and quickness to the life of people, and can prevent the cross transmission of diseases, thereby being popular with wide consumers and catering operators. The plastic cutlery boxes in the market at present are various in variety, and the plastic cutlery boxes are quite large in shape after being processed and molded, such as rectangular, oval, rectangular with rounded corners, square cutlery boxes and the like, and the cutlery boxes are different in specification and layout. In order to realize the processing of the plastic cutlery boxes in various forms, different forming dies are needed to be correspondingly used for processing cutlery boxes with different specifications and shapes.

The plastic cutlery box molding process comprises a plurality of steps, which are needed to be processed in sequence, and finally the plastic cutlery box product is manufactured. But to the plastics cutlery box that has certain thickness, because need carry out the heating and the follow-up injection molding of raw materials to need carry out the punching press in the partial scene, can only carry out subsequent production after a cutlery box cooling design simultaneously, the step is comparatively loaded down with trivial details, leads to current plastics cutlery box production efficiency lower, manufacturing cost is higher.

Disclosure of Invention

The invention aims to provide a high-efficiency processing and forming method for plastic cutlery boxes, which aims to solve the problems of lower production efficiency and higher production cost of plastic cutlery boxes.

In order to achieve the above purpose, the invention adopts the following technical scheme: the high-efficiency processing and forming method for the plastic cutlery box comprises the following steps:

The first dies with various specifications and the corresponding second dies with various specifications are respectively arranged on the first driving roller and the second driving roller;

in the process of reversely rotating the first driving roller and the second driving roller, the first die is buckled with the corresponding second die and is enclosed as a die cavity;

After the raw material is quantitatively extruded into the die cavity from the extrusion head, the first die is separated from the first driving roller, and the first die and the second die are positioned on the second driving roller;

And taking out the finished plastic cutlery box after the raw materials are cooled and shaped in the die cavity, and reinstalling the first die on the first driving roller.

In one possible implementation, the first mold and the corresponding second mold are buckled and surrounded to form a mold cavity, and the method includes:

the relative distance between the first die and the second die is gradually reduced until the first die and the second die are attached under the drive of the first driving roller and the second driving roller;

The first driving roller and the second driving roller are temporarily braked, and the extrusion head injects raw materials into the glue injection ports on the first die and the second die.

In one possible implementation, the positioning of the first mold and the second mold on the second drive roller includes:

a plurality of driving pieces are arranged along the circumferential direction of the first driving roller, and the first die is arranged at the end part of the corresponding driving piece; driving the first mold and the second mold to move by the driving piece;

after the first mold and the second mold are both positioned on the second driving roller, the driving member is separated from the first mold and reset.

In one possible implementation, the first mold of multiple specifications is detachably connected to each of the driving members.

In one possible implementation, the taking out the finished plastic cutlery box after the raw materials are cooled and shaped in the die cavity comprises:

The second driving roller injects cooling water into the first mold and the second mold, thereby cooling the raw material injected into the mold cavity.

In one possible implementation, the method includes, after the raw material is quantitatively extruded from the extrusion head into the die cavity:

heating the first mold and the second mold to improve fluidity of the raw material during injection of the raw material into the mold cavity;

after the injection of the raw material is completed, cooling water is injected into the first mold and the second mold by the second driving roller.

the second driving roller positions the first die and the second die in any mode of magnetic attraction, clamping and positioning pins.

after the plastic cutlery box is cooled and shaped, the cooling water in the first die and the second die is recovered;

And removing the first die from the second die when the extrusion head injects raw materials into the other die cavities.

In one possible implementation, the reinstalling the first mold on the first drive roller includes:

The first die is mounted at an end of the driving member at a predetermined angle when the extrusion head injects the raw material into the other cavity.

In one possible implementation manner, the mounting the first mold of the plurality of specifications and the corresponding second mold of the plurality of specifications on the first driving roller and the second driving roller respectively includes:

According to the requirements of production and orders, a plurality of first molds and second molds with different specifications and different shapes are respectively arranged on the first driving roller and the second driving roller;

under the cooperation of the extrusion heads, plastic cutlery boxes with different shapes and specifications are produced in sequence.

The efficient processing and forming method for the plastic cutlery box provided by the invention has the beneficial effects that: compared with the prior art, in the high-efficiency processing and forming method of the plastic cutlery box, the first dies with various specifications and the corresponding second dies with various specifications are respectively arranged on the first driving roller and the second driving roller. In the process of reversely rotating the first driving roller and the second driving roller, the first die is buckled with the corresponding second die and is enclosed as a die cavity.

In the actual process, after the raw material is quantitatively extruded from the extrusion head into the die cavity, the first die is separated from the first driving roller, and the first die and the second die are both positioned on the second driving roller. And taking out the finished plastic cutlery box after the raw materials are cooled and shaped in the die cavity, and reinstalling the first die on the first driving roller. According to the application, the first die and the second die are matched, so that the processing efficiency of the plastic cutlery box can be increased, and the processing cost is reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments or the description of the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a flowchart of a method for efficiently processing and forming a plastic cutlery box according to an embodiment of the invention.

Detailed Description

In order to make the technical problems, technical schemes and beneficial effects to be solved more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.

Referring to fig. 1, a method for efficiently processing and forming a plastic cutlery box according to the present invention will now be described. A high-efficiency processing and forming method of a plastic cutlery box comprises the following steps:

and respectively installing the first dies with various specifications and the corresponding second dies with various specifications on the first driving roller and the second driving roller.

In the process of reversely rotating the first driving roller and the second driving roller, the first die is buckled with the corresponding second die and is enclosed as a die cavity.

After the feedstock is metered out of the extrusion head into the die cavity, the first die is separated from the first drive roller, and both the first die and the second die are positioned on the second drive roller.

PP, also known as polypropylene, is a semi-crystalline material that is harder and has a higher melting point than Polyethylene (PE) plastic. The PP resin has excellent moisture absorption resistance, acid and alkali corrosion resistance and dissolution resistance. The PP plastic has the advantages of light weight, no rust, good insulativity and the like, and is widely applied to the fields of chemical industry, building materials, household appliances, automobiles, cutlery boxes and the like.

The plastic lunch box is a plastic container made of food-grade plastic raw materials for bringing convenience to people with food, is a common household plastic product in daily life, and is an indispensable plastic container for picnic or hiking.

Plastic cutlery boxes are plastic containers made of food grade plastic stock for convenience of taking food out of us, are very common in daily life, and are generally mainly used for taking out packed food. After plastic sheets are subjected to plastic suction forming through a cutlery box vacuum plastic sucking machine to form cutlery boxes, the formed single cutlery box is needed to be cut off, the conventional method is that manual feeding is performed, an operator holds the whole piece of the cutlery box with the formed plurality of cutlery boxes, then the cutlery box punching machine is controlled to punch and cut the cutlery boxes on the piece one by one, and therefore single cutlery boxes are produced, time and labor are wasted, working efficiency is low, and certain potential safety hazards are achieved.

In some embodiments of the present application, the method for efficiently forming a plastic cutlery box includes:

The relative distance between the first die and the second die is gradually reduced until the first die and the second die are attached under the driving of the first driving roller and the second driving roller.

The plastic lunch box is a plastic container made of food-grade plastic raw materials for facilitating the use of food, is a common household plastic product in our daily life, and is an indispensable plastic container for picnic or hiking. The plastic cutlery box has various styles and sizes for selection, the square plastic cutlery box can be used for storing various condiments, the rectangular plastic cutlery box is easy to store moisture foods such as fruits, vegetables and seafood, the round plastic cutlery box is suitable for storing sauces, sauces and various dishes, the melted plastic is extruded into a specific shape through a die, and the rigid cutlery box can be obtained after cooling.

The existing cutlery box manufacturing mould mainly comprises the steps of melting PP polypropylene or PS polystyrene raw material particles through an injection molding machine, extruding the melted raw materials into a mould cavity through an extruding outlet, enabling the raw materials to enter the mould cavity in the extruding process and discharging air in the mould cavity, accelerating the cooling efficiency of the raw materials through a cooling water pipe designed in the mould, opening the mould after molding, and taking out the shaped cutlery box through ejection of a thimble mechanism, a mechanical arm and a sucker. The existing cutlery box dies are all fixed, cutlery boxes of the same type can be manufactured in the manufacturing process, the cutlery boxes can be manufactured only by replacing the dies if adjustment is needed, a large amount of time is wasted when the dies are replaced and debugged, and the cost consumed by the dies is high.

In some embodiments of the present application that provide an efficient method of forming plastic cutlery boxes, and the positioning of both the first mold and the second mold on the second drive roller comprises:

a plurality of driving pieces are arranged along the circumferential direction of the first driving roller, and the first die is arranged at the end part of the corresponding driving piece; the first mold and the second mold are driven to move by the driving piece.

After the first mold and the second mold are both positioned on the second drive roller, the drive member is separated from the first mold and reset.

In the prior art, after the plastic plate is heated, the plastic plate is stamped in the shape of the cutlery box in a compression molding mode, then the plastic plate is provided with grooves of the cutlery box on the original basis, and then the plastic plate is cut, so that the production is completed. In the manufacturing process of the plastic cutlery box, the stamping and cutting mechanism is used for cutting and separating the plastic sheet and the formed plastic cutlery box. However, in the conventional method, a cavity needs to be formed between two molds, and the melted raw material needs to be injected into the cavity, and after the raw material is cooled, the molds are separated and the subsequent extraction process is completed. That is, in the process of producing the cutlery box, after the raw material is injected into the die cavity, the die needs to be cooled for a period of time to separate and inject the subsequent raw material, and the final result is that the whole cutlery box has lower manufacturing efficiency and lower production speed.

In some embodiments of the efficient plastic cutlery box processing and forming method provided by the application, the first dies with various specifications are detachably connected to each driving piece.

In some embodiments of the present application, the method for efficiently forming plastic cutlery boxes includes the steps of:

Plastic cutlery boxes are plastic containers made of food grade plastic stock used to facilitate our convenience of carrying food outside. It is a common household plastic product in our daily life, and is an indispensable plastic container for picnic or hiking. Plastic cutlery boxes also have a variety of styles and sizes for selection. Square plastic cutlery boxes can be used to store various condiments. Rectangular plastic cutlery boxes are prone to storing moisture containing foods such as fruits, vegetables and seafood. The round plastic cutlery box is suitable for storing sauce, sauce and various dishes.

The plastic cutlery box produced by the method has higher overall thickness, namely the stability of the cutlery box shape can be ensured only by cooling for a period of time after injection molding is finished, and the efficiency of production is lower by adopting the traditional method and the quantity of cutlery boxes produced throughout the day is smaller based on the reason.

In order to improve the production efficiency of the plastic cutlery box, two driving rollers are arranged on two sides of the raw material extrusion head, and the two driving rollers are opposite in rotation direction and same in rotation speed, so that synchronization is realized. The two driving rollers are a first driving roller and a second driving roller, a plurality of first molds are mounted on the first driving roller in the circumferential direction, and a second mold is mounted on the second driving roller in the circumferential direction. The first mold is matched with the second mold so as to form a mold cavity for forming the cutlery box.

More importantly, before injection molding begins, the first die and the second die are respectively arranged at the corresponding positions of the first driving roller and the second driving roller. With the synchronous rotation of the two rollers, the first die and the second die are buckled, and the extrusion head injects raw materials into the formed die cavity. After the raw materials are injected, a driving piece on the first driving roller drives the first die to move, the first die pushes the second die to move, finally, the first die and the second die are positioned on the second driving roller, then the driving piece is separated from the first die, and the first die and the second die rotate along with the second driving roller.

In some embodiments of the present application, a method for efficiently forming a plastic cutlery box includes, after quantitatively extruding a raw material from an extrusion head into a cavity of a die,:

During the injection of the feedstock into the mold cavity, the first mold and the second mold are heated to enhance the flowability of the feedstock.

For a more detailed description, a plurality of cylinders are mounted on the first driving roller, and the first molds are respectively mounted at the ends of the corresponding cylinders. The cylinder can drive the first mould to move, and can also enable the first mould to lean against the second mould so as to form a mould cavity. Under the action of the air cylinder, the first die and the second die are both close to the second driving roller to move, and after the first die and the second die move to the designated position, the second driving roller can position the first die and the second die in an electromagnetic adsorption or mechanical positioning mode, and at the moment, the raw materials injected into the die cavity are cooled in a space formed by the first die and the second die.

the second driving roller positions the first die and the second die by any one of magnetic attraction, a buckle and a positioning pin.

In order to improve the cooling speed of the raw materials, after the air cylinder drives the second die to the designated position of the second driving roller, the water inlet and the water outlet on the second driving roller are respectively communicated with the cooling channel on the second die, cooling water enters the cooling channel through the water inlet, and the raw materials are cooled in the cooling channel and then flow out from the water outlet. Through the arrangement, after the raw materials are injected once, the first die and the second die which are currently injected with the raw materials continue to rotate under the drive of the second driving roller, and the subsequent cooling process is carried out. The injection head can inject the raw materials between the two new dies, so that the problem that the extrusion head needs to wait for the raw materials to be cooled and molded and can be injected again after being taken out is avoided. When the rotation speed of the air cylinder and the second driving roller is higher, the raw materials can be approximately treated as continuous injection, and the processing efficiency of the cutlery box is higher based on the characteristics, and the gap for waiting the raw materials is not caused, so that the production efficiency of the whole cutlery box is greatly improved.

In order to achieve the above technical effects, it is necessary to provide a corresponding switching valve in the second driving roller, and to discharge the cooling water from the corresponding water outlet by opening and closing the switching valve, thereby cooling the raw material in the corresponding mold.

And after the plastic cutlery box is cooled and shaped, recovering cooling water in the first die and the second die.

The first die is removed from the second die while the extrusion head is injecting the material into the other die cavity.

The first die and the second die are positioned on the second driving roller under the driving of the air cylinder, after the positioning of the first die and the second die is completed, the air cylinder resets, and after the air cylinder resets, the first driving roller and the second driving roller rotate, so that subsequent injection is performed. In order to enable the first mold and the second mold to be stably buckled, corresponding mechanical buckles or positioning pins and the like can be arranged between the first mold and the second mold, and the final purpose is to ensure the stability of the relative positions of the first mold and the second mold.

In the practical application process, after the raw materials are injected, the second driving roller can drive the first die and the second die to rotate, and the raw materials in the die cavity are cooled through cooling water in the rotating process. After cooling is completed, the first mold is removed from the second mold, at which point the cooled and formed feedstock may be removed from the second mold by means of manual or related mechanical equipment. And after the formed raw materials are taken down, reinstalling the first die at the corresponding position of the first driving roller, thereby realizing continuous production and processing of the plastic cutlery box.

In some embodiments of the present application, the method for efficiently forming a plastic cutlery box includes the steps of:

When the extrusion head injects the raw material into the other cavity, the first die is mounted at the end of the driving member at a predetermined angle.

The traditional plastic cutlery box processing method is similar to stamping of metal materials, a die is arranged below a punch, and the punch falls down to finish the processing and production of the cutlery box in a shape. However, there is a problem in that, when the conventional lunch box is produced by stamping, the device can only produce the lunch box in one shape due to the fact that the die cannot be replaced in real time. In order to produce cutlery boxes of various shapes at the same time, manufacturers have to replace the die after a period of production, or purchase a plurality of production devices at the same time, which causes waste of resources and occupation of space.

The extrusion head is relatively stable in position, and can reciprocate in a certain direction to facilitate the injection of raw materials to a certain extent, namely, the extrusion head can move towards a die to facilitate the injection of the raw materials. Different moulds can be installed at corresponding positions of the first driving roller and the second driving roller according to the requirement of production in advance, through the arrangement, the production of the lunch boxes with different shapes can be simultaneously carried out under the condition that the moulds are not required to be installed and disassembled under the cooperation of the two driving rollers, and the whole production process is uninterrupted, so that the integration level of equipment is improved.

In some embodiments of the efficient plastic cutlery box processing and forming method provided by the application, installing a first mold with multiple specifications and a corresponding second mold with multiple specifications on a first driving roller and a second driving roller respectively comprises:

According to the requirements of production and orders, a plurality of first molds and second molds with different specifications and different shapes are respectively arranged on the first driving roller and the second driving roller.

Under the cooperation of the extrusion head, plastic cutlery boxes with different shapes and specifications are produced in sequence.

According to the application, the first driving roller and the second driving roller are in a rotating state, and when dies with different shapes are arranged on the first driving roller and the second driving roller, a blanking station can be arranged at different positions of the second driving roller for convenience in blanking. That is, after the second driving roller drives the raw materials to move to different positions, the blanking work of different cutlery boxes can be completed by means of manpower or related mechanical equipment. The end result is that the produced cutlery boxes of different shapes can be piled up, thereby facilitating the subsequent processing.

The embodiment is that the marks can be carried out on the moulds with different shapes, or the different moulds are numbered by corresponding equipment, and after the corresponding positions of the formed cutlery box rotate, the disassembly of the moulds and the blanking of the cutlery box are carried out.

The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, and alternatives falling within the spirit and principles of the invention.

Claims

1. The efficient plastic cutlery box processing and forming method is characterized by comprising the following steps of:

taking out the finished plastic cutlery box after the raw materials are cooled and shaped in the die cavity, and reinstalling the first die on the first driving roller;

the first mold and the corresponding second mold are buckled and enclosed to form a mold cavity, and the mold cavity comprises:

The first driving roller and the second driving roller are temporarily braked, and the extrusion head injects raw materials into the glue injection ports on the first die and the second die;

The positioning of the first mold and the second mold on the second drive roller comprises:

After the first die and the second die are both positioned on the second driving roller, the driving piece is separated from the first die and reset;

The reinstalling the first mold on the first drive roller includes:

2. The method of claim 1, wherein said first molds of a plurality of sizes are detachably connected to each of said driving members.

3. The efficient plastic cutlery box processing and forming method of claim 1, wherein the taking out the finished plastic cutlery box after the raw materials are cooled and shaped in the die cavity comprises:

4. A method of efficiently forming a plastic cutlery box according to claim 3, wherein said step of quantitatively extruding the material from the extrusion head into said cavity comprises:

5. The efficient plastic cutlery box forming method of claim 1, wherein positioning the first mold and the second mold on the second drive roller comprises:

6. A method of efficiently forming a plastic cutlery box according to claim 3, wherein the step of removing the finished plastic cutlery box after the material is cooled and set in the mold cavity comprises:

7. The efficient plastic cutlery box processing and forming method of claim 1, wherein the mounting of the first mold of the plurality of specifications and the corresponding second mold of the plurality of specifications on the first drive roller and the second drive roller, respectively, comprises: