When selecting the injection manipulator according to the processed products, the following key factors need to be considered:

I. Size and weight of products

measure

If the product size is small, such as small electronic parts, plastic toys, etc., you can usually choose a manipulator with a smaller stroke. For example, for some products with a side length of less than a few centimeters, a manipulator with a stroke range of several hundred millimeters can meet the requirements of grasping and placing.

For large-scale products, such as automobile interior parts, large-scale household appliance shells, etc., a manipulator with a large stroke is needed. The extension range of these manipulators may reach several meters, so as to ensure that the products can be accurately grasped and placed in the appropriate position.

weight

For lightweight products (for example, the weight is between a few grams and hundreds of grams), choose a manipulator with less load capacity. For example, a manipulator with a load capacity of 1-5 kg can easily handle the grabbing and handling of small plastic products.

For heavier products (such as industrial parts weighing more than 10 kilograms or even more), a manipulator with higher load capacity is needed. The load capacity of some heavy robots can reach tens of kilograms or even higher to meet the processing requirements of products such as large-scale injection-molded mechanical parts.

Second, the shape and structure of the product

Shape complexity

If the product shape is simple and regular, such as cube, cylinder and other geometric products, the general gripper manipulator can grasp it well. This kind of gripper can be designed into an appropriate shape according to the size of the product, such as a flat gripper for grabbing a square product and an arc gripper for grabbing a round product.

For products with complex shapes, such as products with irregular curved surfaces, holes or concave structures inside, specially designed suction cups or multi-fingered dexterous manipulators may be needed. For example, for automobile parts with complex curved surfaces, the sucker manipulator can realize stable grasping by distributing a plurality of suction cups at appropriate positions on the product surface.

design feature

For products with thin-walled structure or deformable structure, attention should be paid to the control of grasping strength when selecting manipulator. For example, some thin-walled plastic products are easy to be damaged when they are subjected to excessive grasping force. At this time, a manipulator with a pressure sensor can be selected to avoid product damage by accurately controlling the grasping pressure.

Third, the production efficiency requirements

Production beat

If the production process requires high-tempo, fast cycle operation, it is necessary to choose a manipulator with fast speed and precise action. For example, in some high-speed injection molding production lines, it may be necessary to complete multiple injection molding and picking-up operations per minute. At this time, it is necessary for the manipulator to complete actions such as grasping, moving and placing in a short time, and its movement speed may reach several meters per second.

Degree of automation

For fully automatic injection molding production system, it is necessary to choose a manipulator that can seamlessly connect with other equipment (such as injection molding machine, conveyor belt, packaging equipment, etc.). This kind of manipulator should have advanced communication interface, which can receive and send signals and realize the automatic coordination of the whole production process. For example, the manipulator can automatically start the grabbing action according to the molding cycle signal of the injection molding machine, and then accurately place the product on the conveyor belt, and the conveyor belt will transport the product to the next process.

Fourth, the working environment

Cleanliness requirement

In the environment that requires high cleanliness, such as producing high-precision electronic products or medical products, it is necessary to choose a manipulator that meets the standards of clean room. These manipulators usually adopt special materials and designs to reduce the generation and emission of pollutants such as dust and particles. For example, its surface may be made of smooth materials that are not easy to generate static electricity, and cracks and grooves that are easy to accumulate dust are avoided in structure.

Temperature and humidity conditions

In the working environment of high temperature or high humidity, the material and protection grade of the manipulator should be considered. For example, in some injection molding processes, high temperatures will be generated, and at this time, the components of the manipulator need to be able to withstand high temperatures to avoid performance degradation or damage caused by too high temperatures. At the same time, in the high humidity environment, it may be necessary to waterproof and moistureproof the electrical system of the manipulator to prevent it from getting damp.