Forming die for special-shaped plastic uptake part of automotive trim

Abstract

The utility model relates to the technical field of forming dies, in particular to an automotive trim special-shaped plastic uptake part forming die which comprises a lower die, an upper die is movably arranged at the upper end of the lower die, and a pumping mechanism is arranged between one side of the upper die and one side of the lower die. Mold cores are arranged on the inner sides of the lower mold and the upper mold, and demolding mechanisms are arranged in the mold cores. In the process that the air pump is used for pumping air to form negative pressure during mold closing, the stress condition of raw materials close to the air hole can be effectively controlled through the matching of the sealing ring, the ejector pin and the spring, the situation that the raw materials are excessively sunken to enter the air hole due to the too large air pressure difference can be avoided, and therefore the flatness of the surface of a plastic uptake part is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of forming die, specifically is a kind of automobile interior special-shaped blister part forming die. BACKGROUND

[0002] With the continuous development of automobile industry, consumers' requirements for the quality and comfort of automobile interior are increasing. Automobile interior parts not only need to have aesthetic appearance, but also need to meet functional, assembly and durability and other requirements. Automobile interior special-shaped blister parts play a key role in automobile interior, and components such as instrument panel and door interior panel often use special-shaped blister parts, which have unique shape and function, and put forward higher requirements for forming die.

[0003] The air hole on the existing blister mold is used to form negative pressure to adsorb raw materials during blister forming, but the phenomenon of raw materials near the air hole being depressed into the air hole often occurs. This is because the air pressure difference at the air hole causes the raw materials to be subjected to force directed to the inside of the air hole during the blistering process, and the physical properties such as plasticity and viscosity of the raw materials, which easily lead to such depression. This depression will affect the surface flatness and quality of the blister part. SUMMARY

[0004] The utility model aims at providing a kind of automobile interior special-shaped blister part forming die to solve the problems raised in the above background.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0006] A kind of automobile interior special-shaped blister part forming die, comprising

[0007] Lower mold, upper mold is movably arranged at the upper end of lower mold, pumping mechanism is arranged between one side of the upper mold and the lower mold;

[0008] Die pin is arranged on the inner side of the lower mold and the upper mold, demolding mechanism is arranged in the die pin.

[0009] Preferably, the demolding mechanism includes a column groove, a plurality of column grooves are regularly arranged in the die pin, a thimble is movably connected in the column groove, a T-shaped air groove is arranged in the thimble;

[0010] Preferably, the demolding mechanism further includes a side groove, the side groove is annularly arranged on the inner wall of the column groove, a sealing ring is fixedly connected to the bottom end of the thimble, the sealing ring is slidably connected with the side groove, and a spring is arranged between the lower end of the sealing ring and the side groove.

[0011] Preferably, a shunt groove is arranged between the lower mold, the upper mold and the die pin, and the shunt groove is connected with the column groove.

[0012] Preferably, the pumping mechanism comprises connecting pipes, the connecting pipes are arranged at the outer side ends of the shunt grooves, the outer part of the bottom end of the connecting pipes is communicated with an air pump, and the middle parts of the two connecting pipes are communicated through a corrugated pipe;

[0013] Preferably, the cores in the lower mold and the upper mold are matched.

[0014] Compared with the prior art, the automobile interior decoration special-shaped plastic uptake part forming die has the beneficial effects that:

[0015] 1. The automobile interior decoration special-shaped plastic uptake part forming die can effectively control the stress condition of the raw material near the air hole in the process of forming negative pressure by the air pump, can avoid excessive depression of the raw material into the air hole due to too large air pressure difference, and thus guarantees the flatness of the surface of the plastic uptake part.

[0016] 2. The automobile interior decoration special-shaped plastic uptake part forming die can make the gas enter the gap between the raw material and the core by first partially lifting the ejector pin, can completely fill the gap to realize demolding, the relative sliding between the part and the mold is more stable during the whole process, and sharp mechanical friction is not generated, so that the surface of the part is effectively prevented from being scratched, and the appearance quality of the automobile interior part is guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a whole front view structural schematic diagram of the utility model;

[0018] Figure 2 It is a whole sectional view structural schematic diagram of the utility model;

[0019] Figure 3 It is a whole sectional view structural schematic diagram of the utility model; Figure 1 It is an enlarged schematic diagram of A in the utility model;

[0020] Figure 4 It is an enlarged schematic diagram of B in the utility model; Figure 2 It is an enlarged schematic diagram of B in the utility model.

[0021] In the drawing: 1, lower mold; 2, upper mold; 3, core; 4, column groove; 5, ejector pin; 6, T-shaped air groove; 7, side groove; 8, sealing ring; 9, spring; 10, shunt groove; 11, connecting pipe; 12, air pump; 13, corrugated pipe. DETAILED DESCRIPTION

[0022] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of the present application.

[0023] As shown in Figures 1-4 The present application provides a technical solution:

[0024] The automobile interior profiled plastic uptake part forming die comprises a lower die 1, an upper die 2 movably arranged at the upper end of the lower die 1, a pumping mechanism arranged between the upper die 2 and one side of the lower die 1, the pumping mechanism comprising a connecting pipe 11, the connecting pipe 11 being arranged at one end outside the shunt groove 10, an air pump 12 being in communication with the outside of the connecting pipe 11 at the bottom end, the two connecting pipes 11 being in communication through a corrugated pipe 13 between the middle portions of the two connecting pipes 11, and a mold core 3 inside the lower die 1 and the upper die 2 being matched; the mold core 3 is arranged inside the lower die 1 and the upper die 2, a stripping mechanism is arranged inside the mold core 3, the stripping mechanism comprising a column groove 4, a plurality of column grooves 4 being regularly arranged inside the mold core 3, a thimble 5 movably sleeved inside the column groove 4, a T-shaped air groove 6 being arranged inside the thimble 5, the stripping mechanism further comprising a side groove 7, the side groove 7 being annularly arranged at the inner wall of the column groove 4, a sealing ring 8 fixedly connected to the bottom end of the thimble 5, the sealing ring 8 being in sliding connection with the side groove 7, a spring 9 being arranged between the lower end of the sealing ring 8 and the side groove 7, and a shunt groove 10 being arranged between the lower die 1, the upper die 2 and the mold core 3, the shunt groove 10 being in communication with the column groove 4;

[0025] In the present embodiment, in the process of forming negative pressure by air pumping of the air pump 12 during clamping, the stress condition of the raw material near the air hole can be effectively controlled through cooperation of the sealing ring 8, the thimble 5 and the spring 9, and the raw material can be prevented from excessively sinking into the air hole due to excessively large air pressure difference, so that the flatness of the surface of the plastic uptake part is ensured.

[0026] Further, the thimble 5 is first partially lifted by the gas, the gas enters the gap between the raw material and the mold core 3, and then completely fills the gap to realize stripping, and the relative sliding between the part and the mold is more stable during the whole process, and sharp mechanical friction is not generated, so that the scratching of the surface of the part is effectively avoided, and the appearance quality of the automobile interior part is ensured.

[0027] Working principle: when the mold is closed, the mold core 3 in the upper mold 2 presses the mold core 3 in the lower mold 1, and the gas between the two mold cores 3 and in the column groove 4 and the shunt groove 10 is pumped away by the air pump 12 to form a negative pressure, and the sealing ring 8 compresses the spring 9, so that the raw material of the automobile interior irregular plastic vacuum forming part is tightly attached to the forming surface; after the plastic vacuum forming, the air pump 12 is started again, and after the air pump 12 is started, the external air is pressed into the column groove 4 through the shunt groove 10, and the compressed gas in the column groove 4 enters the T-shaped gas groove 6 to lift the ejector pin 5, and after the ejector pin 5 is lifted, the gas smoothly enters the gap between the raw material and the mold core 3, wherein the ejector pin 5 lifts the raw material part to be demolded, and after the compressed gas fills the gap, the remaining part of the raw material can be completely separated from the mold core 3.

[0028] The basic principle, main features and advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only preferred examples of the utility model and do not limit the utility model. Without departing from the spirit and scope of the utility model, the utility model can have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The protection scope of the utility model is defined by the appended claims and their equivalents.

Claims

1. A forming die for a profiled blister part of an automotive interior trim, characterized in that: Comprising The lower mold (1), the upper mold (2) is movably arranged at the upper end of the lower mold (1), and a pumping mechanism is arranged between the upper mold (2) and one side of the lower mold (1); A mold core (3) is arranged on the inner side of the lower mold (1) and the upper mold (2), and a demolding mechanism is arranged in the mold core (3).

2. The forming die for an automobile interior profiled blister part according to claim 1, characterized in that: The demolding mechanism comprises a column groove (4), a plurality of column grooves (4) are regularly arranged in the mold core (3), a thimble (5) is movably sleeved in the column groove (4), and a T-shaped air groove (6) is arranged in the thimble (5).

3. The forming die for an automobile interior profiled blister part according to claim 2, characterized in that: The demolding mechanism further comprises a side groove (7), the side groove (7) is annularly arranged on the inner wall of the column groove (4), a sealing ring (8) is fixedly connected to the bottom end of the thimble (5), the sealing ring (8) is in sliding connection with the side groove (7), and a spring (9) is arranged between the sealing ring (8) and the lower end of the side groove (7).

4. The forming die for an automobile interior profiled blister part according to claim 2, characterized in that: A shunt groove (10) is arranged between the lower mold (1), the upper mold (2) and the mold core (3), and the shunt groove (10) is in communication with the column groove (4).

5. The forming die for an automotive interior profiled blister part according to claim 4, characterized in that: The pumping mechanism comprises a connecting pipe (11), the connecting pipe (11) is arranged at one end of the outer side of the shunt groove (10), an air pump (12) is in communication with the outside of the bottom end of the connecting pipe (11), and the two connecting pipes (11) are in communication through a corrugated pipe (13) between the middle portions of the two connecting pipes (11).

6. The forming die for an automobile interior profiled blister part according to claim 1, characterized in that: The mold core (3) in the lower mold (1) and the upper mold (2) is matched.

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