CN222712718U - Plastic product injection molding mold capable of preventing solidification of residual materials - Google Patents

Abstract

The utility model relates to the technical field of molds, in particular to a plastic product injection molding mold for preventing solidification of residual materials, which comprises a first mounting plate, a core fixing plate, a cavity plate and a connecting plate, wherein guide rods are fixed at four corners of the top of the core fixing plate, guide holes are formed in the cavity plate, the guide rods are inserted into the guide holes in the cavity plate, a detachable core body is arranged at the top of the core fixing plate, a cavity matched with the core body is formed in the cavity plate, a heating cavity is further formed in the top of the cavity plate, and a detachable heating device is arranged in the heating cavity. According to the utility model, by adopting an electromagnetic heating principle, the coil is heated in the die, the coil is electrified, and the die is heated by the alternating magnetic field generated by the electrification of the coil, so that compared with the traditional heating rod heating, the heating mode is more uniform, the heating efficiency is higher, and the power consumption is smaller.

Description

Plastic product injection molding mold capable of preventing solidification of residual materials

Technical Field

The utility model relates to the technical field of molds, in particular to a plastic product injection molding mold capable of preventing solidification of residual materials.

Background

The injection mold is a special tool used in the plastic injection molding process, molten plastic is injected into a mold cavity by using an injection molding machine, and required plastic products are obtained after cooling and solidifying, and the injection mold can be used for producing plastic products with different sizes, shapes and functions so as to meet the requirements of different fields. In the production of plastic products, injection molding technology is a widely used method. However, after a long time of operation, the conventional injection molding mold is easy to cool and solidify plastic remaining inside the mold when the apparatus stops operating, which makes a subsequent injection molding operation difficult. This not only affects the production efficiency but may also lead to a decrease in product quality.

Chinese patent CN222004278U discloses an injection moulding mould, concretely relates to plastic mould technical field, including the backup pad of moulding plastics, one side of the outer terminal surface of backup pad of moulding plastics is equipped with the drive telescopic link, the output shaft of drive telescopic link passes from the terminal surface of backup pad of moulding plastics, and extends to its inboard, the output shaft of drive telescopic link is equipped with the mould backup pad in one side of the backup pad of moulding plastics. The heating rod is arranged in the die, and heat is transferred to the die through the heating rod for heating, so that the die is prevented from being blocked by solidification of materials.

This prior art, though adopts the heater rod to heat the mould, nevertheless because the heater rod directly sets up in the mould, the heater rod circular telegram heats, and heat conduction is inhomogeneous in the mould, leads to the temperature that is close to the heater rod in the mould to be high, keeps away from the temperature in the heater rod region low, in order to solve this problem, constantly improves the temperature of heater rod, and the temperature improves, makes the electric current of heating increase, leads to power consumption also to increase.

Disclosure of utility model

The utility model aims to provide a plastic product injection molding die for preventing solidification of residual materials, which adopts an electromagnetic heating principle, heats a coil in the die, electrifies the coil, and heats the die through an alternating magnetic field generated by electrifying the coil.

In order to solve the problems in the prior art, the utility model provides a plastic product injection molding die for preventing solidification of residual materials, which comprises a first mounting plate, a core fixing plate, a cavity plate and a connecting plate, wherein guide rods are fixed at four corners of the top of the core fixing plate, guide holes are formed in the cavity plate, the guide rods are inserted into the guide holes in the cavity plate, a detachable core body is arranged at the top of the core fixing plate, a cavity matched with the core body is formed in the cavity plate, a heating cavity is further formed in the top of the cavity plate, a detachable heating device is arranged in the heating cavity, a protrusion is further arranged in the cavity at the top of the cavity plate, the heating device comprises a protective shell, a coil for heating is arranged in the protective shell, and when the coil is electrified, the coil generates an alternating magnetic field, so that the temperature of the protrusion in the cavity plate is raised. Preferably, a plurality of clamping pieces for fixing the coil are further arranged in the protective shell, and a temperature sensor for detecting temperature is further arranged in the cavity plate.

Preferably, a protrusion is further arranged in the cavity at the top of the cavity plate, the heating device comprises a protection shell, a coil for heating is arranged in the protection shell, and when the coil is electrified, the coil generates an alternating magnetic field, so that the temperature of the protrusion in the cavity plate is increased.

Preferably, a plurality of clamping pieces for fixing the coil are further arranged in the protective shell, and a temperature sensor for detecting temperature is further arranged in the cavity plate.

Preferably, the protection shell is further provided with a cable interface for connecting a cable, and the cable interface is clamped in the cavity plate.

Preferably, a flow channel for material flow is formed in the protrusion in the cavity plate, a connecting plate is arranged at the top of the cavity plate, a second mounting plate is arranged at the top of the connecting plate, through holes are formed in the central positions of the connecting plate and the second mounting plate, a material guide pipe is further arranged in the through holes in the second mounting plate, and the bottom end of the material guide pipe penetrates through the through holes in the connecting plate and the second mounting plate and is inserted into the flow channel in the cavity plate.

Preferably, the bottom of the core fixing plate is also provided with a cooling cavity, a cooling pipe for cooling the product is arranged in the cooling cavity, and a pipeline interface connected with a pipeline is connected to the cooling pipe.

Preferably, the cooling pipes are crisscrossed pipes to form a cooling area.

Preferably, a position of the core fixing plate, which is close to the core body, is provided with a limiting piece for limiting and fixing the core body, and one side of the limiting piece is in contact with the surface of the core body.

Preferably, the both sides at first mounting panel top are fixed with the mount pad, the top of mount pad is fixed with first backup pad, and the top of first backup pad is fixed with the second backup pad, and the top of second backup pad and the bottom fixed connection of core fixed plate, the central point at mount pad top put and is fixed with first ejector pad, and first ejector pad top is fixed with the second ejector pad, is provided with a plurality of ejector pad on the second ejector pad, and the ejector pad extends to the core fixed plate through first backup pad and second backup pad, still be provided with a plurality of reset lever on the second ejector pad, the cover is equipped with reset spring on the reset lever, and reset spring's one end is connected with first backup pad, and reset spring's the other end is connected with the second ejector pad.

Compared with the prior art, the utility model has the beneficial effects that:

1. According to the application, the coil is arranged in the heating cavity in the cavity plate, when the coil is electrified, the coil generates an alternating magnetic field, and the heating cavity is provided with the protrusions, so that eddy currents are generated in the protrusions, the protrusions are heated by the eddy currents, the heat conversion rate is particularly high and can reach 95% at most due to a direct heating mode, compared with the traditional resistance heating mode, the electromagnetic heating has higher heat efficiency, and the electricity saving effect can reach 30% -70%;

2. The coil of the application does not generate heat, has small thermal hysteresis and low thermal inertia, thus the temperature control is real-time and accurate, the coil is wound by a special high-temperature and high-pressure resistant special cable wire special for customization, the insulation performance is good, direct contact with a mould is not needed, no electric leakage and short circuit faults are generated, and the heat is accumulated in the bump by adopting an internal heating mode, so that the heat loss is reduced.

Drawings

FIG. 1 is a schematic perspective view of an injection molding mold for plastic articles, which prevents solidification of residual materials;

FIG. 2 is a schematic view of a first explosive structure of an injection mold for plastic articles, which prevents solidification of residual materials, according to the present utility model;

FIG. 3 is a schematic view of a second explosive structure of an injection mold for plastic articles to prevent solidification of residual materials according to the present utility model;

FIG. 4 is a schematic cross-sectional view of an injection mold for plastic articles to prevent solidification of residual materials according to the present utility model;

FIG. 5 is a schematic view showing the internal structure of a cavity plate of an injection molding mold for plastic products, which prevents solidification of residual materials;

FIG. 6 is a schematic view showing a first perspective structure of a core fixing plate of an injection molding mold for plastic products, which prevents solidification of residual materials;

Fig. 7 is a second perspective view of an injection mold for plastic articles, which prevents solidification of residual materials, according to the present utility model.

The number of the installation seats is 1, a first installation plate, 2, an installation seat, 3, a first support plate, 4, a second support plate, 5, a core fixing plate, 51, a guide rod, 52, a cooling cavity, 6, a cavity plate, 61, a runner, 7, a connection plate, 8, a second installation plate, 9, a first pushing piece plate, 10, a second pushing piece plate, 11, a reset rod, 111, a reset spring, 12, a cooling pipe, 121, a pipeline interface, 13, a limiting piece, 14, a core body, 15, a guide pipe, 16, a protection shell, 161, a clamping piece, 162, a coil, 163, a cable interface, 17 and a pushing piece rod.

Detailed Description

The utility model will be further described in detail with reference to the drawings and the detailed description below, in order to further understand the features and technical means of the utility model and the specific objects and functions achieved.

Referring to fig. 1 to 7, the utility model provides a plastic product injection molding mold for preventing solidification of residual materials, which comprises a first mounting plate 1, a core fixing plate 5, a cavity plate 6 and a connecting plate 7, wherein guide rods 51 are fixed at four corners of the top of the core fixing plate 5, guide holes are arranged in the cavity plate 6, the guide rods 51 are inserted into the guide holes in the cavity plate 6, and the guide rods 51 are inserted into the guide holes in the cavity plate 6, so that the cavity plate 6 can move stably and accurately in the injection molding process. The precision and stability of the die are improved. The top of the core fixing plate 5 is provided with a detachable core body 14, a cavity matched with the core body 14 is arranged inside the cavity plate 6, and plastic materials are filled in the cavity in the injection molding process to form the shape of a final product. The cavity plate 6 top still is provided with the heating chamber, and is provided with the heating device that can dismantle in the heating chamber, and heating device heats the type chamber around moulding plastics, ensures that the residual material can not solidify to improve production efficiency. Through introducing heating chamber and detachable heating device, effectively solved the problem that the residual material solidifies in the injection molding process. This design improves the production efficiency.

The cavity at the top of the cavity plate 6 is also provided with a bulge, the heating device comprises a protective shell 16, a coil 162 for heating is arranged in the protective shell 16, and when the coil 162 is electrified, the coil 162 generates an alternating magnetic field, so that the bulge temperature in the cavity plate 6 is increased. When the coil 162 is energized, the coil 162 generates an alternating magnetic field that induces a current in the protrusions in the cavity plate 6, thereby generating heat that increases the protrusion temperature. The heating mode is called induction heating, and has the advantages of high heating speed, high efficiency, uniform heating and the like. The inside fastener 161 that is used for fixing coil 162 that still is provided with of protective housing 16, and the inside temperature sensor that is used for detecting temperature that still is provided with of die cavity board 6, temperature sensor can real-time supervision die cavity board 6's temperature, ensures that the heating process goes on in safe, controllable within range. When the temperature reaches a preset value, the sensor sends out a signal to control the heating device to stop working so as to prevent the die or the product from being damaged by overheating.

When the coil 162 is electrified, the coil 162 generates an alternating magnetic field, and the heating cavity is provided with the protrusions, so that eddy currents are generated in the protrusions, the protrusions are heated through the effect of the eddy currents, and the direct heating mode is adopted, so that the heat conversion rate is particularly high and can reach 95%, the electromagnetic heating efficiency is higher, and the electricity-saving effect can reach 30% -70% compared with the traditional resistance heating mode.

The protective housing 16 is further provided with a cable connection 163 for connecting a cable, the cable connection 163 being clamped in the cavity plate 6. Is a cable for connecting the heating device, particularly coil 162, to an external power source or control system. Through this interface, the current can be safely and reliably transferred to the coil 162, thereby generating an alternating magnetic field and heating the protrusions in the cavity plate 6.

The flow channel 61 for material flow is formed in the bulge in the cavity plate 6, the connecting plate 7 is arranged at the top of the cavity plate 6, the second mounting plate 8 is arranged at the top of the connecting plate 7, through holes are formed in the center positions of the connecting plate 7 and the second mounting plate 8, the through holes in the second mounting plate 8 are further provided with the material guide pipe 15, the bottom end of the material guide pipe 15 penetrates through the through holes in the connecting plate 7 and the second mounting plate 8 and is inserted into the flow channel 61 in the cavity plate 6, and in the injection molding process, plastic melt enters the flow channel 61 through the material guide pipe 15 and then flows to the cavity for molding. The feed tube 15 is typically made of a high temperature, corrosion resistant material to ensure that it is able to withstand the scouring and corrosion of the high temperature melt during injection molding.

The bottom of the core fixing plate 5 is also provided with a cooling cavity 52, a cooling pipe 12 for cooling the product is arranged in the cooling cavity 52, and a pipeline interface 121 connected with a pipeline is connected to the cooling pipe 12. The cooling pipes 12 are crisscrossed pipes configured to increase cooling area. The crisscrossed pipe arrangement also helps to ensure uniform distribution of the cooling fluid in the cooling chamber 52, and avoids unacceptable product quality caused by uneven cooling of the product.

The cooling fluid enters the cooling tube 12 through the pipe joint 121 and circulates therein. Because the cooling pipes 12 are formed by criss-cross pipes, the cooling liquid can fully contact and take away the heat in the product. As the cooling fluid circulates, the product gradually cools and reaches the desired hardness and dimensional stability. Finally, after the product has cooled completely, the mold can be opened and the product removed.

The core fixing plate 5 is provided with a stopper 13 for limiting and fixing the core body 14 at a position close to the core body 14, and one side of the stopper 13 is in contact with the surface of the core body 14.

The both sides at the top of first mounting panel 1 are fixed with mount pad 2, the top of mount pad 2 is fixed with first backup pad 3, the top of first backup pad 3 is fixed with second backup pad 4, the top of second backup pad 4 is fixed with the bottom fixed connection of core fixed plate 5, the central point at mount pad 2 top puts and is fixed with first ejector pad 9, first ejector pad 9 top is fixed with second ejector pad 10, be provided with a plurality of ejector pins 17 on the second ejector pad 10, ejector pins 17 extend and pass first backup pad 3 and second backup pad 4 and extend to in the core fixed plate 5, still be provided with a plurality of reset lever 11 on the second ejector pad 10, the cover is equipped with reset spring 111 on the reset lever 11, the one end of reset spring 111 is connected with first backup pad 3, the other end of reset spring 111 is connected with second ejector pad 10.

At the time of demolding, the ejector pin device of the injection molding machine starts to work, pushing the first stripper plate 9 and the second stripper plate 10 to move forward. The first pusher plate 9 and the second pusher plate 10 push the cooled and shaped product out of the mold by pushing the pusher bar 17, and the demolding process of the product is completed.

The working principle is that when the die is used for injection molding, the die is firstly installed in an injection molding machine. The injection molding machine tightly combines the upper and lower mold portions of the mold by a mold closing action, and then the injection molding machine injects molten material into the mold through the injection molding machine nozzle. The molten material is guided by the guide pipe 15 and smoothly flows into the runner 61 inside the mold. The molten material is uniformly distributed between the core body 14 and the cavity under the guidance of the runner 61, and is molded into a desired shape by the molding action of the mold. In order to accelerate the cooling and shaping of the molten mass, a cooling liquid is introduced into the cooling tube 12. The cooling liquid circulates in the cooling pipe 12 to take away the heat of the core fixing plate 5 and the surrounding thereof, so that the melted material is rapidly cooled and solidified to be formed. After injection molding is completed, the injection molding machine performs a mold opening action to separate the upper and lower mold portions of the mold. At this time, the ejector pin device of the injection molding machine starts to operate, pushing the first stripper plate 9 and the second stripper plate 10 forward. The first pusher plate 9 and the second pusher plate 10 push the cooled and shaped product out of the mold by pushing the pusher bar 17, and the demolding process of the product is completed. In order to avoid cooling and blocking of the molten material in the runner 61 during mold closing, the present mold employs an electromagnetic heating technique. By energizing the coil 162, the coil 162 generates an alternating magnetic field. The protruding structure in the heating cavity generates vortex under the action of the magnetic field, and the vortex directly heats the protruding. The direct heating mode has extremely high heat conversion rate up to 95%, and compared with the traditional resistance heating mode, the electromagnetic heating mode has higher heat efficiency and electricity-saving effect up to 30-70%. By electromagnetic heating technology, the problem of cooling blockage of the molten material in the runner 61 is effectively avoided, and smooth injection molding is ensured.

The foregoing examples merely illustrate one or more embodiments of the utility model, which are described in greater detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of the utility model should be assessed as that of the appended claims.

Claims (8)

1. The plastic product injection molding die capable of preventing solidification of residual materials is characterized by comprising a first mounting plate (1), a core fixing plate (5), a cavity plate (6) and a connecting plate (7), wherein guide rods (51) are fixed at four corners of the top of the core fixing plate (5), guide holes are formed in the cavity plate (6), the guide rods (51) are inserted into the guide holes in the cavity plate (6), a detachable core body (14) is arranged at the top of the core fixing plate (5), a cavity matched with the core body (14) is formed in the cavity plate (6), a heating cavity is further formed in the top of the cavity plate (6), a detachable heating device is arranged in the heating cavity, protrusions are further arranged in the cavity of the top of the cavity plate (6), the heating device comprises a protective shell (16), and a coil (162) used for heating is arranged in the protective shell (16), so that when the coil (162) is electrified, the coil (162) generates an alternating magnetic field, and the temperature of the protrusions in the cavity plate (6) rises.

2. The injection molding die for plastic products, which is capable of preventing solidification of residual materials, according to claim 1, wherein a plurality of clamping pieces (161) for fixing coils (162) are further arranged inside the protective shell (16), and a temperature sensor for detecting temperature is further arranged inside the cavity plate (6).

3. The injection molding mold for plastic articles, which is capable of preventing solidification of residual materials, according to claim 2, wherein the protective housing (16) is further provided with a cable interface (163) for connecting cables, and the cable interface (163) is clamped in the cavity plate (6).

4. The injection molding die for plastic products for preventing solidification of residual materials, as set forth in claim 1, is characterized in that the protrusions in the cavity plate (6) are provided with flow channels (61) for material flow, the top of the cavity plate (6) is provided with a connecting plate (7), the top of the connecting plate (7) is provided with a second mounting plate (8), through holes are formed in the center positions of the connecting plate (7) and the second mounting plate (8), the through holes in the second mounting plate (8) are further provided with a material guide pipe (15), and the bottom ends of the material guide pipe (15) penetrate through the through holes in the connecting plate (7) and the second mounting plate (8) and are inserted into the flow channels (61) in the cavity plate (6).

5. The injection molding mold for plastic products, which is used for preventing solidification of residual materials, according to claim 1, characterized in that the bottom of the core fixing plate (5) is also provided with a cooling cavity (52), a cooling pipe (12) used for cooling the products is arranged in the cooling cavity (52), and a pipeline interface (121) connected with a pipeline is connected to the cooling pipe (12).

6. An injection mold for plastic articles, which prevents solidification of residual materials, as set forth in claim 5, wherein said cooling tubes (12) are crisscrossed tubes configured to increase cooling area.

7. The injection molding mold for plastic products, which is capable of preventing solidification of residual materials, according to claim 5, wherein the core fixing plate (5) is provided with a limiting piece (13) for limiting and fixing the core body (14) at a position close to the core body (14), and one side of the limiting piece (13) is contacted with the surface of the core body (14).

8. The injection molding die for plastic products for preventing solidification of residual materials, as set forth in claim 1, is characterized in that mounting seats (2) are fixed on two sides of the top of the first mounting plate (1), a first supporting plate (3) is fixed on the top of the mounting seats (2), a second supporting plate (4) is fixed on the top of the first supporting plate (3), the top of the second supporting plate (4) is fixedly connected with the bottom of the core fixing plate (5), a first pushing plate (9) is fixed on the center position of the top of the mounting seats (2), a second pushing plate (10) is fixed on the top of the first pushing plate (9), a plurality of pushing rods (17) are arranged on the second pushing plate (10), the pushing rods (17) extend through the first supporting plate (3) and the second supporting plate (4) and extend into the core fixing plate (5), a plurality of reset rods (11) are further arranged on the second pushing plate (10), a reset spring (111) is sleeved on the reset rods (11), one end of the reset spring (111) is connected with the first supporting plate (3), and the other end of the reset spring (111) is connected with the second pushing plate (111).