CN112895287A

CN112895287A - Nine-leg tray compression molding process

Info

Publication number: CN112895287A
Application number: CN202110069548.1A
Authority: CN
Inventors: 缪杰
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-01-19
Filing date: 2021-01-19
Publication date: 2021-06-04

Abstract

The invention relates to the field of compression molding, in particular to a nine-leg tray compression molding process, which comprises the steps of modifying crushed waste cloth and solid waste materials, granulating and synthesizing plastic particles, feeding the plastic particles into a special plastic extrusion cylinder, heating, closing a mold of the mold, leaving a gap of 5-10 mm, not combining the plastic particles in place, injecting melted plastic and unmelted molten glue plastic into the mold together, closing the mold for extrusion, directly extruding and filling the unmelted plastic into a product when the unmelted plastic is filled, opening the mold after cooling and molding, and ejecting a finished product.

Description

Nine-leg tray compression molding process

Technical Field

The invention relates to the field of compression molding, in particular to a nine-leg tray compression molding process.

Background

At present, when national solid waste (PP, PE and HDPC) is treated in the market, most of the solid waste is buried and burned, the pollution is large, the waste can be modified to enable an injection molding machine to perform injection molding and extrude the plastic, waste materials are changed into valuable materials, but the existing process performs injection molding firstly and then extrudes the plastic, so that the process is complicated, time and labor are consumed, and the solid waste has poor flowability, so that the existing process can not perform injection molding on the solid waste.

Disclosure of Invention

Based on the technical scheme, the nine-leg tray compression molding process is short in molding period and has the advantages of being efficient and energy-saving.

The application provides a nine-leg tray compression molding process, which comprises the following steps:

1) modifying the crushed waste cloth and solid waste, granulating and synthesizing into plastic particles, feeding the plastic particles into a special plastic extruding cylinder and heating to melt part of the waste, wherein the temperature of the mixed materials is not reached and is not melted;

2) closing the mold and leaving a gap of 5-10 mm, and not combining the mold in place;

3) injecting the melted and unmelted molten glue plastic into a mold;

4) closing the die for extrusion, and directly extruding and filling the unmelted plastic into the product when the unmelted plastic is filled;

5) and opening the die after cooling and forming, and ejecting a finished product.

In a possible implementation mode, in the step 1), a double-screw granulation device is adopted, 3% of PP maleic anhydride grafting, 1% of K550 coupling agent, 1% of paraffin, 2% of POE, 0.3% of 168 antioxidant and 0.2% of 1010 antioxidant are added to modify waste cloth spinning and solid waste materials, the double-screw granulation device can mix PP, PE, ABS, PA, PVC, PET and the like generated by classified recycling of garbage in social sources together, and the PP, PE, ABS, PA, PVC, PET and the like cannot be sorted by a physical method.

In a possible implementation manner, the heating temperature in step 1) is 230 ℃.

In a possible implementation manner, the mold in the step 2) comprises a fixed mold and a movable mold, and the movable mold is connected with the telescopic mechanism and the material injection device.

In a possible implementation manner, the molten plastic in the step 3) is input through a feeding port of the mold, heated through a hot runner, and finally injected into the mold through a 1-20-point needle valve feeding port.

In a possible implementation manner, the unmelted plastic in step 4) includes waste plastic PP, PE, ABS, PA, PVC, PET, and non-woven fabric.

In a possible implementation manner, the finished product in the step 5) is ejected through a cylinder inside the die.

Compared with the prior art, the invention has the following characteristics and beneficial effects:

1. the method has the advantages that 10MM space is reserved when the fixed die and the movable die are closed, so that after plastic particles are filled into a hot runner of the die by the injection molding machine, the hot runner is heated, the fixed die and the movable die are closed and extruded to form, and compared with the method that injection molding is carried out firstly, and then the fixed die and the movable die are directly closed and compressed, the method has higher speed;

2. the modified wood pallet can be used for treating national solid waste (PP, PE and HDPC), changes waste into valuable, has high strength and is not easy to deform and impact resistant after being modified, can replace the traditional disposable wood pallet in service life, and can be recycled for secondary production.

Drawings

In order to more clearly illustrate the embodiments of the present application or technical solutions in related arts, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without inventive efforts.

FIG. 1 is a process flow diagram of the present invention;

FIG. 2 is a view showing the state of a compression molding process in an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. All other examples, which can be obtained by a person skilled in the art without making any inventive step based on the examples in this application, are within the scope of protection of this application.

It should be understood by those skilled in the art that technical or scientific terms used in the claims and the specification should have the ordinary meaning as understood by those having ordinary skill in the art to which this application belongs. "connected" or "coupled" and like terms are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect; "and/or" describes the association relationship of the associated objects, indicating that three relationships may exist; the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to an orientation or positional relationship as shown in the drawings, which are used for convenience in describing and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be used in a particular manner without limitation.

To solve the above problems, as shown in fig. 1-2, an embodiment of the present invention provides a nine-leg pallet compression molding process, including the steps of:

1) the crushed waste cloth is spun and solid waste is modified, granulated and synthesized into plastic particles, the plastic particles enter a special plastic extrusion cylinder and are heated, the heating temperature is 230 ℃, and partial waste is melted, wherein the temperature of the mixed materials (PP, PE, ABS, PA, PVC, PET, non-woven fabrics and the like) is not reached and is not melted;

3) injecting the melted and unmelted molten glue plastic into a mold;

5) and opening the die after cooling and forming, and ejecting a finished product. .

The method comprises the following steps of 1) adding 3% of PP maleic anhydride grafting, 1% of K550 coupling agent, 1% of paraffin, 2% of POE, 0.3% of 168 antioxidant and 0.2% of 1010 antioxidant into double-screw granulation equipment to modify waste cloth spinning and solid waste materials, mixing PP, PE, ABS, PA, PVC, PET and the like generated by classified recycling of garbage in social sources by the double-screw granulation equipment, wherein the PP, PE, ABS, PA, PVC, PET and the like cannot be separated by a physical method, and adding formula auxiliaries into the double screws to enable the mixed plastics to be fully mixed, complement the performances, balance the strength and toughness and meet the requirement of general application performances of products.

The die in the step 2) comprises a fixed die and a movable die, and the movable die is connected with the telescopic mechanism and the material injection device.

And 3) inputting the molten plastic through a feeding port of the mold, heating the molten plastic through a hot runner, and finally injecting the molten plastic into the mold through a 1-20-point needle valve feeding port.

The unmelted plastic in the step 4) comprises waste plastic PP, PE, ABS, PA, PVC, PET and non-woven fabrics.

Ejecting the finished product in the step 5) through an air cylinder in the die

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present application. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A nine-leg tray compression molding process is characterized in that: the method comprises the following steps:

1) modifying the crushed waste cloth and solid waste, granulating and synthesizing plastic particles, feeding the plastic particles into a special plastic extruding cylinder and heating to melt part of the waste;

3) injecting the melted and unmelted molten glue plastic into a mold;

2. The nine-legged pallet compression molding process according to claim 1, wherein step 1) adopts a twin-screw granulation device, and 3% of PP-maleic anhydride graft, 1% of K550 coupling agent, 1% of paraffin, 2% of POE, 0.3% of 168 antioxidant and 0.2% of 1010 antioxidant are added to modify waste cloth spinning and solid waste materials.

3. A nine-legged pallet compression molding process as claimed in claim 1 wherein the heating temperature of step 1) is 230 degrees.

4. The nine-legged pallet compression molding process according to claim 1, wherein the mold in step 2) comprises a fixed mold and a movable mold, and the movable mold is connected with the telescopic mechanism and the material injection device.

5. The nine-legged pallet compression molding process according to claim 1, wherein the molten plastic in step 3) is fed through a feeding port of the mold, heated by a hot runner, and finally injected into the mold through a 1-20-point needle valve feeding port.

6. The nine-legged pallet compression molding process according to claim 1, wherein the unmelted plastic of step 4) comprises waste plastics PP, PE, ABS, PA, PVC, PET, non-woven fabrics.

7. A nine-legged pallet compression molding process as claimed in claim 1, wherein the finished product of step 5) is ejected by means of a pneumatic cylinder inside the mold.