CN218615216U - Injection mold of car key epitheca - Google Patents

Abstract

The utility model relates to an injection mold of automobile key epitheca, including upper die base, die holder, upper mold kernel and lower mould benevolence, still include the button and insert, the button is inserted and is included the column part, the column part top is equipped with the button shaping surface, the column part is inside to be equipped with the high temperature control runner, the lower mould benevolence is equipped with lower die cavity forming part and is located the insert through-hole in lower die cavity forming part, be equipped with first supply runner in the die holder, the button is inserted and is installed in the die holder, and first supply runner and high temperature control runner intercommunication, the column part is located the insert through-hole, and tight fit between column part and the insert through-hole; the upper die core is provided with an upper die cavity forming part; the upper die core and the lower die core are both provided with cooling control flow passages; when the injection mold is closed, an injection molding cavity for injection molding of the automobile key upper shell is formed among the upper cavity forming part, the lower cavity forming part and the key molding surface, and the key molding surface is used for forming a key pit.

Description

Injection mold of car key epitheca

Technical Field

The utility model relates to an injection mold technical field, concretely relates to injection mold of car key epitheca.

Background

The current automobile key is soft and beautiful in appearance, excellent in performance, waterproof, dustproof and high in cost performance. The product of the automobile key upper shell 1 is shown in fig. 1, the product is of a thin shell structure, the material is PA12, the pressing force is reduced at the middle three keys, the thickness of the thin wall is only 0.7mm, the thin wall is thinner than other areas, three pit structures are formed at the three keys when viewed from the inner shell surface of the automobile key upper shell 1, the key pits 11 can be called, and the outer shell surface is of a smooth thin shell structure. The periphery of the inner shell surface of the automobile key upper shell 1 is also provided with a buckling part used for being clamped with the automobile key inner shell.

Because the key is an appearance piece, the circular arc is required to be smooth and round when the upper shell is injected, and the upper shell has no epitome and no weld mark. These requirements are contradictory in the production of the actual product for the following reasons: 1. the thickness of the three keys is only 0.7mm, the resistance in the mold is the largest during injection molding, the material is easy to be deficient and becomes a defective product, in order to ensure production, the injection molding pressure and the injection molding speed must be increased on the injection molding process, the mold temperature is improved, and the fluidity of molten material is increased, but when the product material is PA12, the high pressure and the high speed during injection molding can cause the increase of burrs on the parting surface of the mold, which is a big taboo of an appearance piece; 2. in order to ensure that the surface of a product is smooth, has no epitome and no weld mark, the temperature of a mold must be increased and the pressure maintaining pressure is increased during the injection molding of the product, but the temperature of the mold is high, the product is in a high-temperature transition state during the demolding, and a buckling part on the product is very small, so that the product is easily pulled up by the inclined top of the mold during the demolding; and when the pressure maintaining pressure of the injection molding process is increased, burrs at the glue opening of the product are increased.

Therefore, due to the special design of the product, the product meeting the quality requirement is difficult to manufacture by using a common mould.

SUMMERY OF THE UTILITY MODEL

In view of the above prior art's shortcoming, the to-be-solved technical problem of the utility model is to provide an injection mold of car key epitheca, can ensure the smooth flow of molten material of the button department of car key epitheca during moulding plastics, can control the temperature of other parts simultaneously, avoid forming the burr at the mould die joint, improve injection molding quality and work efficiency.

In order to achieve the above object, the utility model provides an injection mold of car key epitheca, the inner shell face of car key epitheca has the button pit, injection mold includes upper die base, die holder, installs the upper die benevolence on the upper die base and installs the lower mould benevolence at the die holder, still includes the button and inserts, the button is inserted and is included the stand portion, stand portion top is equipped with the button shaping face, stand portion inside is equipped with the high temperature control runner, the lower die benevolence is equipped with lower die cavity forming part and is located the insert through-hole in lower die cavity forming part, be equipped with first supply runner in the die holder, the button is inserted and is installed in the die holder, and first supply runner and high temperature control runner intercommunication, the stand position is in the insert through-hole, and stand portion and insert between the through-hole tight fit; the upper die core is provided with an upper die cavity forming part; the upper die core and the lower die core are both provided with cooling control flow passages; when the injection mold is closed, an injection molding cavity for injection molding of the automobile key upper shell is formed among the upper cavity forming part, the lower cavity forming part and the key molding surface, and the key molding surface is used for forming a key pit.

Further, high temperature control flow path in the stand portion includes preceding vertical section, back vertical section and is located the main working section between vertical section and the back vertical section before, preceding vertical section and back vertical section all extend along stand portion length direction, main working section is close to the button profiled surface.

Furthermore, the wall thickness between the main working section and the key forming surface is 0.5-2 mm.

Furthermore, the main working section is arc-shaped and takes the central axis of the upright post part as the center of a circle.

Furthermore, a plurality of column parts are arranged in the key insert, each column part is used for forming a key pit, and the high-temperature control flow channels in the column parts are sequentially communicated in series to form an integrated flow channel.

Furthermore, the high-temperature control flow passage in the key insert is an inner hole formed in the key insert.

Furthermore, a second supply flow passage is arranged on the lower die base and is communicated with a cooling control flow passage in the lower die core.

As described above, the utility model relates to an injection mold has following beneficial effect:

by arranging the key insert and arranging the cooling control flow passages in the upper die core and the lower die core, during injection molding, constant-temperature fluid with proper temperature is introduced into the high-temperature control flow passage of the key insert through the first supply flow passage of the lower die base, so that the temperature of the key molding surface at the top of the upright post part is increased, the temperature of the injection molding cavity is in a higher state at the position, molten material can be quickly filled to the position, and the problem of unsmooth material flow caused by too thin thickness of the molten material at the position can be solved; meanwhile, constant-temperature fluid with proper temperature is introduced into the cooling control flow passages in the upper mold core and the lower mold core to cool the mold, so that the upper mold core and the lower mold core are not influenced by molten materials and are maintained in a proper temperature range, the quality of injection molding products cannot be influenced by continuous rising of the mold temperature, and the product is ensured to have no burrs at the parting surface of the mold. The utility model discloses an injection mold can ensure the smooth runner of melting material of the button department of car key epitheca during moulding plastics, can control the temperature of other parts simultaneously, avoids forming the burr at the mould die joint, improves injection moulding quality and work efficiency.

Drawings

Fig. 1 is a schematic structural view of the outer shell surface of the automobile key upper shell.

Fig. 2 is a schematic structural view of an inner shell surface of an upper shell of an automobile key.

Fig. 3 is the utility model discloses injection mold's die holder, the mercy and key structure sketch map of inserting of lower mould.

Fig. 4 is an installation schematic diagram of the key insert in the lower die base according to the present invention.

Fig. 5 is a schematic structural view of a lower mold insert of the present invention. .

Fig. 6 is a schematic view illustrating the installation of the key insert and the lower mold insert of the present invention.

Fig. 7 is a schematic view of the arrangement of the cooling control flow passage in the lower mold core of the present invention, and the main structure of the lower mold core is omitted.

Fig. 8 is a schematic structural diagram of the key insert of the present invention.

Fig. 9 is a schematic layout view of the high temperature control flow channel in the key insert of the present invention.

Fig. 10 is a schematic structural diagram of a high temperature control flow channel in the key insert of the present invention.

Fig. 11 is a schematic structural diagram of an upper mold base and an upper mold insert of the injection mold of the present invention.

Description of the reference numerals

1. Automobile key upper case

11. Key pit

12. Clamping part

2. Lower die holder

3. Lower die core

31. Insert block through hole

32. Lower cavity forming part

4. Key insert

41. Upright post part

42. Key forming surface

43. High-temperature control flow passage

431. Main working section

432. Front vertical segment

433. Rear vertical section

5. Upper die holder

6. Upper die core

61. Upper cavity forming part

7. Cooling control flow passage

Detailed Description

The following description is provided for illustrative purposes, and other advantages and features of the present invention will become apparent to those skilled in the art from the following detailed description.

It should be understood that the drawings of the present application are only used to match the contents disclosed in the specification, so as to be known and read by those skilled in the art, and not to limit the practical limitations of the present invention, so that the present application does not have any technical significance, and any modification of the structure, change of the ratio relationship, or adjustment of the size should still fall within the scope of the present application without affecting the function and the achievable purpose of the present application. Meanwhile, the terms such as "upper", "lower", "left", "right", "middle", and the like used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof may be considered as the scope of the present invention without substantial changes in the technical content.

Referring to fig. 1 to 11, the utility model provides an injection mold of an automobile key upper shell 1, refer to fig. 1 and 2, the inner shell surface of the automobile key upper shell 1 has a key pit 11, the injection mold includes an upper die base 5, a lower die base 2, an upper die core 6 installed on the upper die base 5, a lower die core 3 installed on the lower die base 2, and a key insert 4, the key insert 4 includes a column portion 41, a key forming surface 42 is provided on the top of the column portion 41, a high temperature control runner 43 is provided inside the column portion 41, the lower die core 3 is provided with a lower die cavity forming portion 32 and an insert through hole 31 located in the lower die cavity forming portion 32, a first supply runner (not shown in the drawings) is provided in the lower die base 2, the key insert 4 is installed in the lower die base 2, and the first supply runner is communicated with the high temperature control runner 43, the column portion 41 is located in the insert through hole 31, and the column portion 41 is tightly fitted with the insert through hole 31; the upper die core 6 is provided with an upper cavity forming part 61; the upper die core 6 and the lower die core 3 are both provided with a cooling control flow passage 7; when the injection mold is closed, an injection mold cavity for injection molding of the automobile key upper shell 1 is formed among the upper mold cavity forming part 61, the lower mold cavity forming part 32 and the key forming surface 42, and the key forming surface 42 is higher than the surface of the lower mold cavity forming part 32 and is used for forming the key recess 11.

The utility model relates to an injection mold, the quantity of the stand portion 41 of key insert 4 sets up according to the quantity of the button pit 11 of car key epitheca 1, and wherein the shape of button profiled surface 42 sets up according to button pit 11 shape. When the mold is closed, the upper mold base 5 and the lower mold base 2 are closed, when the mold is injected, the surface of the lower cavity forming part 32 forms an inner shell surface of the automobile key upper shell 1, the key forming surface 42 at the top of the upright post part 41 forms a key pit 11, the side surface of the upright post part 41 is tightly matched with the hole wall of the insert through hole 31, namely the upright post part 41 is tightly contacted with the insert through hole 31, so that the molten material during the injection molding is difficult to enter, and the injection molding burrs are reduced. And the side surface of the upright column part 41 is tightly contacted and matched with the hole wall of the insert through hole 31 to form sealing, so that molten material (material for injection molding the automobile key upper shell 1) cannot enter between the upright column part and the insert through hole, and the outer shell surface of the automobile key upper shell 1 is formed at the upper cavity forming part 61. In the injection molding process, constant temperature fluid with proper temperature is introduced into the high-temperature control flow channel 43 of the key insert 4 through the first supply flow channel of the lower die holder 2, so that the temperature of the key forming surface 42 at the top of the upright post part 41 is increased, the temperature of the injection molding cavity is in a higher state at the position, the molten material can be quickly filled to the position, and the problem of unsmooth material flow caused by too thin thickness of the molten material at the position can be solved; meanwhile, constant-temperature fluid with proper temperature is introduced into the cooling control flow channels 7 in the upper mold core 6 and the lower mold core 3 to cool the mold, so that the upper mold core 6 and the lower mold core 3 are not influenced by molten materials and are maintained in a proper temperature range, the quality of injection molding products cannot be influenced by continuous rising of mold temperature, no burr is left on the parting surfaces of the mold, and the injection molding quality and the working efficiency are improved.

Referring to fig. 3 to 11, the present invention will be further described with a specific embodiment as follows:

in the present embodiment, referring to fig. 8, 9 and 10, as a preferred design, the high temperature control flow channel 43 in the upright part 41 mainly includes three parts, including a front vertical section 432, a rear vertical section 433, and a main working section 431 located between the front vertical section 432 and the rear vertical section 433, both the front vertical section 432 and the rear vertical section 433 extend along the length direction of the upright part 41, and the main working section 431 is close to the key forming surface 42. During operation, high-temperature fluid enters from the front vertical section 432 and exits from the rear vertical section 433, the main working section 431 has a proper extension length, is parallel or approximately parallel to the key forming surface 42, and has a wall thickness between 0.5 mm and 2mm preferably, so that the main working section 431 can meet structural strength and is extremely thin, heat conduction is facilitated, and the temperature of the key forming surface 42 of the upright post 41 can be better controlled by the main working section 431.

In the present embodiment, referring to fig. 8, 9 and 10, as a preferred design, the column part 41 of the key insert 4 is cylindrical, and preferably, the main working section 431 is circular arc-shaped, that is, extends for a certain length along the circular arc direction, and the center axis of the column part 41 is taken as the center, that is, the distance between the main working section 431 and the peripheral surface of the column part 41 is the same, so that the main working section 431 can have a longer extending length, and can better control the temperature of the key forming surface 42. Of course, the pillar portion 41 may have a triangular prism shape, an elliptic prism shape, or the like, and may be determined according to the shape of the key of the automobile key top case 1.

In this embodiment, referring to fig. 8, 9 and 10, as a preferred design, the key insert 4 has a plurality of upright portions 41, each upright portion 41 is used to form one key depression 11, and the high temperature control flow channels 43 in the upright portions 41 are sequentially communicated in series, that is, the rear vertical section 433 and the front vertical section 432 in two adjacent upright portions 41 are communicated, so as to form an integrated high temperature control flow channel 43 in the key insert 4.

In the present embodiment, referring to fig. 8, 9 and 10, as a preferred design, the integrated high temperature control flow channel 43 in the key insert 4 is an inner hole formed in the key insert 4, so that the manufacturing is convenient, and the material of the key insert 4 is made of metal for an injection mold and is made by 3D printing for size reasons.

In the present embodiment, referring to fig. 5, 6 and 11, two lower cavity forming parts 32 are provided in the lower mold core 3, each lower cavity forming part 32 is equipped with a key insert 4, and two upper cavity forming parts 61 are provided in the upper mold core 6, so that injection molding of two automobile key upper shell 1 products can be completed at a time.

In the present embodiment, referring to fig. 5, 6 and 7, the high temperature control flow path 43 in the lower core 3 is disposed according to actual conditions, preferably around the two lower cavity forming parts 32, and the temperature at the lower cavity forming parts 32 can be well controlled. A second supply flow passage (not shown in the drawing) is arranged in the lower die base 2, the second supply flow passage is communicated with a cooling control flow passage 7 in the lower die core 3, and the second supply flow passage is externally connected with constant temperature fluid and supplies the constant temperature fluid to the cooling control flow passage 7 in the lower die core 3. Similarly, a third supply flow channel (not shown in the drawing) is arranged in the upper die base 5 and is communicated with the cooling control flow channel 7 in the upper die core 6, so that the assembly and the connection are convenient.

As can be seen from the above, the injection mold in the present embodiment has the following technical effects:

can ensure during moulding plastics that the melting material of the button department of car key epitheca 1 flows smoothly, guarantees the quality at button position, can control the mould temperature of other positions departments simultaneously, avoids forming the burr at the mould die joint, and the mould is in the lowering temperature when the drawing of patterns, improves injection quality and work efficiency.

To sum up, the utility model discloses various shortcomings in the prior art have effectively been overcome and high industry value has.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Any person skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (7)

1. The utility model provides an injection mold of car key epitheca, the interior shell face of car key epitheca (1) has button pit (11), injection mold includes upper die base (5), die holder (2), installs upper die benevolence (6) on upper die base (5) and installs lower mould benevolence (3) at die holder (2), its characterized in that: the key structure is characterized by further comprising a key insert (4), the key insert (4) comprises a column part (41), a key forming surface (42) is arranged at the top of the column part (41), a high-temperature control runner (43) is arranged inside the column part (41), the lower die core (3) is provided with a lower die cavity forming part (32) and an insert through hole (31) located in the lower die cavity forming part (32), a first supply runner is arranged in the lower die base (2), the key insert (4) is installed in the lower die base (2), the first supply runner is communicated with the high-temperature control runner (43), the column part (41) is located in the insert through hole (31), and the column part (41) is in tight fit with the insert through hole (31); the upper die core (6) is provided with an upper die cavity forming part (61); the upper die core (6) and the lower die core (3) are both provided with cooling control flow passages (7); when the injection mold is closed, an injection molding cavity for injection molding of the automobile key upper shell (1) is formed among the upper cavity forming part (61), the lower cavity forming part (32) and the key molding surface (42), and the key molding surface (42) is used for forming the key pit (11).

2. An injection mold according to claim 1, characterized in that: high temperature control flow path (43) in riser portion (41) include preceding vertical section (432), back vertical section (433) and lie in preceding vertical section (432) and back vertical section (433) between main working section (431), preceding vertical section (432) and back vertical section (433) all extend along riser portion (41) length direction, main working section (431) are close to button profiled surface (42).

3. An injection mold according to claim 2, characterized in that: the wall thickness between the main working section (431) and the key forming surface (42) is 0.5-2 mm.

4. An injection mold according to claim 2, characterized in that: the main working section (431) is arc-shaped and takes the central axis of the upright column part (41) as the center of a circle.

5. An injection mold according to claim 1, characterized in that: the key insert (4) is provided with a plurality of upright columns (41), each upright column (41) is used for forming one key pit (11), and high-temperature control flow passages (43) in the upright columns (41) are sequentially communicated in series to form an integrated flow passage.

6. An injection mold according to claim 1 or 5, characterized in that: the high-temperature control flow channel (43) in the key insert (4) is an inner hole formed in the key insert (4).

7. An injection mold according to claim 1, characterized in that: and a second supply flow channel is arranged on the lower die seat (2), and the second supply flow channel is communicated with a cooling control flow channel (7) in the lower die core (3).

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