阅读说明：本技术 一种塑胶产品生产工艺 (Plastic product production process ) 是由 张伟玲 伍耀结 何雪锋 于 2021-06-29 设计创作，主要内容包括：本发明公开一种塑胶产品生产工艺,包括以下步骤：S1、原料准备：对塑料原料进行干燥；S2、原料称重：将各个注塑用原料按配比称量；S3、注塑准备：将S2中的注塑用原料导入注塑机的料斗中,将所需的注塑模具放置于注塑机的锁模装置中进行固定,对注塑模具进行预加热；S4、注塑检查：利用计量称检查料斗中注塑用原料的量,利用温度检测仪检测注塑模具及冷却水管的温度；增加了注塑检查的步骤,确保在进行注塑之前各个部件都处于最佳的工作状态,避免不同批次的生产过程中,工作部件的参数不同导致成品质量不一；同时在工艺过程中增设了干燥机、混料机、碎料机及冻水机,降低人工参与注塑过程的比率,降低工艺误差。(The invention discloses a plastic product production process, which comprises the following steps: s1, preparing raw materials: drying the plastic raw material; s2, weighing raw materials: weighing the raw materials for injection molding according to the proportion; s3, injection molding preparation: introducing the raw material for injection molding in the step S2 into a hopper of an injection molding machine, placing a required injection mold in a mold locking device of the injection molding machine for fixing, and preheating the injection mold; s4, injection molding inspection: checking the amount of the raw materials for injection molding in the hopper by using a scale, and detecting the temperatures of the injection mold and the cooling water pipe by using a temperature detector; the injection molding inspection step is added, so that each part is ensured to be in the optimal working state before injection molding, and the condition that the quality of finished products is different due to different parameters of the working parts in the production process of different batches is avoided; meanwhile, a dryer, a mixer, a crusher and a water freezing machine are additionally arranged in the process, so that the ratio of manual injection molding is reduced, and the process error is reduced.)

1. A production process of a plastic product is characterized by comprising the following steps:

s1, preparing raw materials: drying the plastic raw material;

s2, weighing raw materials: weighing the raw materials for injection molding according to the proportion;

s3, injection molding preparation: introducing the raw material for injection molding in the step S2 into a hopper of an injection molding machine, placing a required injection mold in a mold locking device of the injection molding machine for fixing, and preheating the injection mold;

s4, injection molding inspection: checking the amount of the raw materials for injection molding in the hopper by using a scale, and detecting the temperatures of the injection mold and the cooling water pipe by using a temperature detector;

s5, injection molding: the injection molding machine melts the raw materials for injection molding into molten plastics and then injects the molten plastics into a fixed injection mold at a certain injection speed;

s6, pressure maintaining and feeding: compacting and supplementing molten plastic in an injection mold;

s7, cooling and forming: cooling the molten plastic subjected to pressure maintaining and material supplementing, and cooling and forming to obtain an injection molding finished product;

s8, demolding: and (5) separating the cooled and formed finished product from the mold.

2. The process for producing a plastic product according to claim 1, wherein: in step S2, the injection molding raw material includes a plastic raw material, a nozzle material, and a toner.

3. The process for producing a plastic product according to claim 1, wherein: in step S1, the drying of the plastic raw material is completed by a dryer.

4. The process for producing a plastic product according to claim 1, wherein: the step S2 further includes mixing the injection molding principles by a mixer.

5. The process for producing a plastic product according to claim 2, wherein: in the step S1, the proportion of the added water gap material is 24% -27% of the total amount, and the water gap material is made by breaking the separated runner or the scrapped plastic through a crusher.

6. The process for producing a plastic product according to claim 1, wherein: in step S3, the injection mold is preheated by electric heating.

7. The process for producing a plastic product according to claim 1, wherein: in step S5, the forward movement parameter of the screw is changed from a constant speed to a constant pressure, thereby maintaining the pressure.

8. The process for producing a plastic product according to claim 1, wherein: and S8, cooling and forming, namely cooling the die by using a cooling water pipe, wherein the cooling water pipe is cooled by a water freezing machine.

Technical Field

The invention relates to the technical field of production processes, in particular to a production process of a plastic product.

Background

The injection molding process is the most important processing process in the production process of plastic products, and is a process for manufacturing a semi-finished product with a certain shape by pressurizing, injecting, cooling, separating and the like molten raw materials, and the defective rate is often increased due to manual or machine errors in the injection molding process, so that the factory interest rate is influenced.

In the process of the existing plastic production process, defective products are usually removed only by performing quality inspection on products in the last step, but the problem of product defect caused by material defect cannot be removed, and the waste amount of raw materials cannot be reduced.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides a plastic product production process, which can solve the problems in the background art.

The technical scheme adopted by the invention for solving the technical problems is as follows: a production process of a plastic product comprises the following steps:

s1, preparing raw materials: drying the plastic raw material;

s2, weighing raw materials: weighing the raw materials for injection molding according to the proportion;

s3, injection molding preparation: introducing the raw material for injection molding in the step S2 into a hopper of an injection molding machine, placing a required injection mold in a mold locking device of the injection molding machine for fixing, and preheating the injection mold;

s4, injection molding inspection: checking the amount of the raw materials for injection molding in the hopper by using a scale, and detecting the temperatures of the injection mold and the cooling water pipe by using a temperature detector;

s5, injection molding: the injection molding machine melts the raw materials for injection molding into molten plastics and then injects the molten plastics into a fixed injection mold at a certain injection speed;

s6, pressure maintaining and feeding: compacting and supplementing molten plastic in an injection mold;

s7, cooling and forming: cooling the molten plastic subjected to pressure maintaining and material supplementing, and cooling and forming to obtain an injection molding finished product;

s8, demolding: and (5) separating the cooled and formed finished product from the mold.

Further, in step S2, the injection molding raw material includes a plastic raw material, a nozzle material, and a toner;

further, in the step S1, drying the plastic raw material is completed by a dryer;

further, the step S2 includes mixing the injection molding principles by a mixer;

further, in the step S1, the proportion of the added nozzle material is 24% to 27% of the total amount, and the nozzle material is made by breaking the detached runner or the scrapped plastic through a crusher;

further, in the step S3, the preheating of the injection mold is performed by electric heating;

further, in the step S5, the forward parameter of the screw is changed from a constant speed to a constant pressure, so as to realize pressure maintaining;

further, in the step S8, the cooling forming utilizes a cooling water pipe to cool the mold, and the cooling water pipe is cooled by a water freezing machine.

Compared with the prior art, the invention has the beneficial effects that: according to the plastic product production process, the step of injection molding inspection is added, each part is ensured to be in the best working state before injection molding, and the condition that the quality of finished products is different due to different parameters of the working parts in the production process of different batches is avoided; meanwhile, defective products in the raw materials can be detected in advance, and further waste in the next step is avoided; meanwhile, a dryer, a mixer, a crusher and a water freezing machine are additionally arranged in the process, so that the ratio of manual injection molding is reduced, and the process error is reduced.

Drawings

FIG. 1 is a flow chart of an injection molding process of the plastic product of the present invention;

FIG. 2 is a flowchart of the process of step S2 in the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The process for producing a plastic product according to the invention is described in detail below with reference to FIGS. 1-2: a production process of a plastic product comprises the following steps:

s1, preparing raw materials: drying the plastic raw material;

s2, weighing raw materials: weighing the raw materials for injection molding according to the proportion;

s3, injection molding preparation: introducing the raw material for injection molding in the step S2 into a hopper of an injection molding machine, placing a required injection mold in a mold locking device of the injection molding machine for fixing, and preheating the injection mold;

s4, injection molding inspection: checking the amount of the raw materials for injection molding in the hopper by using a scale, and detecting the temperatures of the injection mold and the cooling water pipe by using a temperature detector;

s5, injection molding: the injection molding machine melts the raw materials for injection molding into molten plastics and then injects the molten plastics into a fixed injection mold at a certain injection speed;

s6, pressure maintaining and feeding: compacting and supplementing molten plastic in an injection mold;

s7, cooling and forming: cooling the molten plastic subjected to pressure maintaining and material supplementing, and cooling and forming to obtain an injection molding finished product;

s8, demolding: and (5) separating the cooled and formed finished product from the mold.

In the step S2, the raw material for injection molding includes a plastic raw material, a nozzle material, and a toner; in the step S1, drying the plastic raw material is completed by a dryer; the step S2 also comprises the step of mixing the injection molding principles by a mixer; in the step S1, the proportion of the added water gap material is 24-27% of the total amount, and the water gap material is made by breaking the separated runner or the scrapped plastic through a crusher;

in the step S3, the preheating of the injection mold is performed by electric heating; in the step S5, the forward parameters of the screw are changed from constant speed to constant pressure to realize pressure maintaining; and S8, cooling and forming, namely cooling the die by using a cooling water pipe, wherein the cooling water pipe is cooled by a water freezing machine.

The working principle is as follows: mixing and stirring various raw materials into a raw material for injection molding, fixing an injection mold, preheating to finish S1-S3 injection molding preparation, preheating the injection mold to avoid the high-temperature injection molding raw material from contacting the mold, and cracking due to overlarge temperature difference; checking the working conditions of all parts, detecting the temperatures of the injection mold and the cooling water pipe by using a temperature detector, maintaining the temperature of the cooling water pipe at about 10 ℃ as much as possible, checking whether residual raw materials exist on the screw, avoiding influencing the process, and finishing the S4 injection molding check, wherein the step is favorable for reducing the defective rate of products; an injection step S5 follows, in which the screw is set at a constant speed to ensure better and faster entry of the molten plastic into the mold; then, the molten plastic enters S6 pressure maintaining and feeding, the screw is converted from a constant speed to a constant pressure, the pressure of the molten plastic in the mold is ensured to be given by the screw, better molding is facilitated, and meanwhile, the molten plastic is fed into the mold through the screw, so that defects are avoided; then S7 cooling molding is carried out, part of heat of the molten plastic is diffused into the outside air, and part of heat is diffused into an external cooling water pipe through a mold cooling fin, and the water in the cooling water pipe is flowing water, so that the temperature of the cooling water pipe is ensured to be constant; and finally, selecting a top rod or a stripping plate to carry out S8 stripping according to the product requirement.

In conclusion, the plastic product production process provided by the invention has the advantages that the injection molding inspection step is added, each part is ensured to be in the best working state before injection molding, and the condition that the quality of finished products is different due to different parameters of the working parts in the production process of different batches is avoided; meanwhile, defective products in the raw materials can be detected in advance, and further waste in the next step is avoided; meanwhile, a dryer, a mixer, a crusher and a water freezing machine are additionally arranged in the process, so that the ratio of manual injection molding is reduced, and the process error is reduced.

It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.