CN211137994U - Precise injection molding mould structure for automobile wheel cover with non-uniform wall thickness - Google Patents

Abstract

The utility model provides a non-uniform wall thickness automobile wheel cover precision injection molding die structure belongs to the mould field. The wheel cover comprises a lower die, wherein a wheel cover block protruding from the lower die is arranged on the lower die, a lower forming surface used for forming the inner side surface of the wheel cover of the automobile is arranged on the wheel cover block, two ends of the forming surface are respectively connected with a side forming surface arranged on the lower die, a side forming block which can move back and forth repeatedly along the horizontal direction is arranged on each side forming surface, and a limiting block which can be clamped with the upper die is further arranged on the wheel cover block. The utility model discloses the advantage lies in that the restriction piece among the device moves the in-process towards the lower mould at last mould, can play the removal of mould in direction and the restriction to prevent to go up the mould and lie in the lower mould cooperation in-process and take place slight displacement, improve the accuracy.

Description

Precise injection molding mould structure for automobile wheel cover with non-uniform wall thickness

Technical Field

The utility model belongs to the mould field especially relates to a non-uniform wall thickness car wheel casing precision injection moulding mould structure.

Background

In current injection mold, go up the cooperation of mould and lower mould simple, go up the mould and be close to the lower mould and laminate with the lower mould under the exogenic action, though easy operation is convenient, nevertheless go up the mould and be not accurate enough with the lower mould cooperation, often can produce the displacement deviation in the cooperation of mould and lower mould, injection moulding's the piece of moulding also has certain deformation than in the standard component.

For example, chinese patent literature discloses a precision injection mold [ patent application No.: [ CN201821889657.8], including the fixed die plate and the movable die plate, there are male dies on the fixed die plate, there are female dies on the movable die plate, there are liquid inlets and cooling channels in the male dies, the cooling channel includes the longitudinal flow path set up at intervals, the liquid inlet has horizontal flow path communicating each longitudinal flow path, the end of the longitudinal flow path has liquid discharge ports, there are jacks corresponding to the liquid discharge ports on the male die, there are insert pins cooperating with the jacks and used for plugging up the liquid discharge ports on the female die, adopt the layout that the horizontal flow path communicates with longitudinal flow path, on the one hand guarantee the comprehensiveness of the cooling area, on the other hand through setting up multiple liquid discharge ports, when the male die and female die are in the die assembly state, the insert pin cooperates with the jack and the liquid discharge port is plugged up by the insert pin, finish cooling and then the die sinking, the insert pin breaks away from the liquid discharge port, the coolant in the cooling, the influence of the waste heat on the forming of the next product is reduced, but the device is not provided with a precise part for preventing displacement between two forming surfaces.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the above-mentioned problem, a non-uniform wall thickness automobile wheel casing precision injection moulding mould structure is provided.

In order to achieve the above purpose, the utility model adopts the following technical proposal:

the lower die is provided with a wheel cover block protruding from the lower die, the wheel cover block is provided with a lower forming surface used for forming the inner side surface of the automobile wheel cover, two ends of the forming surface are respectively connected with a side forming surface arranged on the lower die, each side forming surface is provided with a side forming block which can move back and forth repeatedly along the horizontal direction, and the wheel cover block is further provided with a limiting block which can be clamped with the upper die.

In the structure of the precise injection molding mould for the automobile wheel cover with the non-uniform wall thickness, one end of the limiting block connected with the wheel cover block extends towards the direction far away from the wheel cover block, a limiting cavity with an upward opening is arranged in the limiting block, and the cross section area of the limiting cavity is gradually reduced from one end far away from the wheel cover block to the other end.

In the above-mentioned non-uniform wall thickness automobile wheel cover precision injection molding mould structure, the side forming block is located at both ends of the lower mould, and the side forming block and the lower mould form a clamping connection and can move back and forth repeatedly along the horizontal direction, the end surface of the side forming block close to the lower mould is provided with a convex clamping block, and both sides of the lower mould are respectively provided with a concave clamping groove matched with the convex clamping block.

In the above-mentioned non-uniform wall thickness automobile wheel casing precision injection molding die structure, when the convex clamping block extends into the corresponding concave clamping groove and the end surface of the convex clamping block is completely contacted with the end wall of the concave clamping groove, a gap is formed between the side forming block and the wheel casing block.

In the above-mentioned precise injection molding mold structure for the automobile wheel cover with non-uniform wall thickness, at least one side clamping groove movably connected with the side forming block is respectively arranged at two ends of the lower mold, the side clamping groove and the side forming block form a clamping connection, the side clamping groove is inclined, and the inclined side clamping groove is inclined upwards from one end close to the wheel cover block and extends towards the direction far away from the wheel cover block.

In the above-mentioned non-uniform wall thickness automobile wheel casing precision injection molding die structure, the two sides of the lower die are respectively provided with a plurality of positioning limiting grooves, the positioning limiting grooves are horizontally arranged, and the plurality of positioning limiting grooves are also positioned on the two sides of the wheel casing block and have gaps with the wheel casing block.

In the non-uniform wall thickness automobile wheel cover precise injection molding mould structure, the positioning limiting grooves close to the limiting blocks are provided with the fixture blocks, and the horizontal heights of the fixture blocks are higher than the height of the positioning limiting grooves and lower than the horizontal height of the limiting blocks.

In the above-mentioned precise injection molding mold structure for the automobile wheel cover with non-uniform wall thickness, a clamping block groove is arranged in the clamping block, the clamping block groove is arranged along the vertical direction, and the cross section area of the clamping block is gradually reduced from the end part close to the limiting block to the other end.

In the structure of the precise injection molding mould for the automobile wheel cover with the non-uniform wall thickness, the positioning limiting groove comprises an outer groove communicated with an external space, an inner groove is communicated with the end part, far away from the external space, of the outer groove, and the cross section area of the inner groove is larger than that of the outer groove.

In the precise injection molding die structure for the automobile wheel cover with the non-uniform wall thickness, a plurality of jacking blocks capable of repeatedly moving back and forth along the vertical direction are further arranged in the wheel cover block, and at least two jacking rods which are symmetrical along the central line of the jacking blocks are arranged on the lower end face of each jacking block.

Compared with the prior art, the utility model has the advantages of:

1. the limiting block in the device can play a role in guiding and limiting the movement of the upper die in the process that the upper die moves towards the lower die, so that the upper die is prevented from generating slight displacement in the lower die matching process, and the accuracy is improved.

2. The side forming block and the side clamping groove in the device form clamping connection and move back and forth along the side clamping groove, the side forming block is prevented from moving to generate displacement, and accuracy is improved.

3. The positioning limiting groove in the device consists of an inner groove and an outer groove, the cross section area of the inner groove is larger than that of the outer groove, and the connecting part of the side forming block and the inner groove cannot slide into the outer groove in the moving process of the side forming block, so that the side forming block is prevented from generating left and right displacement in the moving process, and the accuracy is improved.

Drawings

Fig. 1 is an overall schematic view of the utility model;

fig. 2 is an exploded schematic view of the utility model;

FIG. 3 is a schematic structural view of a side forming block;

fig. 4 is a schematic view of another direction of the utility model;

fig. 5 is a schematic sectional view a-a of fig. 4.

In the figure: the lower die 10, the wheel cover block 11, the forming surface 12, the side forming surface 13, the side forming block 14, the limiting block 15, the limiting cavity 16, the convex clamping block 17, the concave clamping groove 18, the positioning limiting groove 19, the clamping block 20, the outer groove 21, the inner groove 22, the top block 23, the ejector rod 24, the side clamping groove 25 and the clamping block groove 26.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.

Referring to fig. 1-2, the precise injection molding die structure for the automobile wheel cover with the non-uniform wall thickness comprises a lower die 10, wherein a wheel cover block 11 protruding from the lower die 10 is arranged on the lower die 10, a lower molding surface 12 for molding the inner side surface of the automobile wheel cover is arranged on the wheel cover block 11, two ends of the molding surface 12 are respectively connected with a side molding surface 13 arranged on the lower die 10, a side molding block 14 repeatedly moving back and forth along the horizontal direction is arranged on each side molding surface 13, and a limiting block 15 capable of being clamped with the upper die is further arranged on the wheel cover block 11. In the mold closing process, the upper mold is not shown to move towards the lower mold 10 and is clamped with the lower mold 10, the limiting block 15 extends into the upper mold and is clamped with the upper mold, so that the upper mold is limited to move and can not move forwards, backwards, leftwards and rightwards, an upper forming surface for forming the inner side surface of the wheel cover of the automobile is arranged in the upper mold and is not shown, a forming cavity is formed by the upper forming surface 12 and is used for forming a plastic part, and in addition, the side forming block 14 is close to the wheel cover block 11 along the horizontal direction and is used for forming a side edge of the plastic part by the lower forming surface 12 on the wheel cover block 11.

One end of the limiting block 15 connected with the wheel cover block 11 extends towards the direction far away from the wheel cover block 11, a limiting cavity 16 with an upward opening is arranged in the limiting block 15, and the cross section area of the limiting cavity 16 is gradually reduced from the end far away from the wheel cover block 11 to the other end. When the upper die approaches the lower die 10, the restriction block 15 will extend into the upper die, and the parts of the upper die will also extend into the restriction cavity 16 of the restriction block 15, because the cross-sectional area of the limiting cavity 16 is gradually reduced from one end far away from the wheel cover block 11 to the other end, the cross-sectional area of the limiting cavity 16 close to the port of the upper die is larger, the component on the upper die can easily slide into the limiting cavity 16, the component on the upper die can continuously extend towards the bottom of the limiting cavity as the upper die continues to move towards the lower die 10, the limiting cavity 16 has a guiding function as the cross-sectional area of the limiting cavity 16 is gradually reduced, the end wall of the limiting cavity 16 can drive the upper die to move to a specified position, and finally, the components of the upper die extend to the bottom of the limiting cavity 16 and are abutted against the components of the upper die through the end walls of the bottom of the limiting cavity 16, so that the upper die is limited from causing slight displacement of the upper die, and the accuracy is improved.

As shown in fig. 3, the side forming blocks 14 are located at two ends of the lower die 10, the side forming blocks 14 are clamped with the lower die 10 and can move back and forth repeatedly along the horizontal direction, the end surfaces of the side forming blocks 14 close to the lower die 10 are provided with convex clamping blocks 17, and two sides of the lower die 10 are respectively provided with a concave clamping groove 18 matched with the convex clamping blocks 17. In this example, the convex block 17 is matched with the concave clamping groove 18, when the side forming block 14 moves towards the wheel cover block 11 until the convex block 17 extends into the concave clamping groove 18, each end wall of the concave clamping groove 18 is contacted with the convex block 17 in an abutting mode without a gap, and therefore the convex block 17 is limited from moving, and accuracy is improved.

When the convex block 17 extends into the corresponding concave slot 18 and the end surface of the convex block 17 is completely contacted with the end wall of the concave slot 18, a gap is formed between the side forming block 14 and the wheel cover block 11. When the male locking piece 17 moves to the bottom end of the female locking groove 18, the side forming piece 14 moves to a designated position at this time, and the gap between the side forming piece 14 and the wheel cover piece 11 is used for forming the side wall of the plastic part.

Two ends of the lower die 10 are respectively provided with at least one side clamping groove 25 movably connected with the side forming block 14, the side clamping grooves 25 are clamped with the side forming block 14, the side clamping grooves 25 are inclined, and the inclined side clamping grooves 25 are inclined upwards from one end close to the wheel cover block 11 and extend towards the direction far away from the wheel cover block 11. When the side forming block 14 moves to the convex clamping block 17 to extend into the concave clamping groove 18 towards the wheel cover block 11, the convex clamping block 17 is matched with the concave clamping groove 18, so that the side forming block 14 cannot have displacement deviation in the moving process of the side forming block 14, the convex clamping block 17 is prevented from not sliding into the concave clamping groove 18 and being damaged due to impact with the lower die 10, therefore, in the example, the side forming block 14 and the side clamping groove 25 form clamping connection and move back and forth along the side clamping groove 25, the side forming block 14 is prevented from moving to generate displacement, and the accuracy is improved.

The two sides of the lower die 10 are respectively provided with a plurality of positioning limiting grooves 19, the positioning limiting grooves 19 are horizontally arranged, and the positioning limiting grooves 19 are also positioned on the two sides of the wheel cover block 11 and have gaps with the wheel cover block 11. The two sides of the lower die 10 are movably connected with a side forming block, which is not shown in the figure, the side forming block on one side of the lower die 10 is movably connected with a plurality of positioning limiting grooves 19, the side forming block can approach towards the wheel cover block 11 along the positioning limiting grooves 19, when the side forming block moves to the bottom end of the positioning limiting grooves 19, a gap is formed between the side forming block and the wheel cover block 11, and the gap is used for generating a plastic part side wall.

The positioning limiting grooves 19 close to the limiting block 15 are provided with fixture blocks 20, and the horizontal height of the fixture blocks 20 is higher than that of the positioning limiting grooves 19 and lower than that of the limiting block 15. When the side forming block moves to the bottom end of the positioning limiting groove 19, the side forming block can be clamped with the clamping block 20, and the side forming block is prevented from influencing the forming of the plastic part.

The latch 20 is provided with a latch groove 26 therein, the latch groove 26 is disposed in a vertical direction, and a cross-sectional area of the latch 20 is gradually reduced from an end portion near the restriction piece 15 toward the other end. The latch 20 not only engages the side form block but also engages the top mold, and when the top mold is moved toward the bottom mold 10 and the cavity 16 is allowed to limit the movement of the top mold, the upper mold components can also extend into the latch slot 26 in the latch 20, and further prevent the top mold from being displaced by the end wall of the latch slot 26 contacting the upper mold components.

The positioning limiting groove 19 comprises an outer groove 21 communicated with the external space, the end part of the outer groove 21 far away from the external space is communicated with an inner groove 22, and the cross-sectional area of the inner groove 22 is larger than that of the outer groove 21. In order to prevent the side forming blocks from being displaced left and right during the movement when the side forming blocks approach toward the wheel housing block 11 along the positioning restriction groove 19, and to improve the accuracy, in this example, the positioning restriction groove 19 is provided with an inner groove 22 and an outer groove 21, and the cross-sectional area of the inner groove 22 is larger than that of the outer groove 21, the side forming blocks can move only back and forth along the inner groove 22, and since the cross-sectional area of the inner groove 22 is larger than that of the outer groove 21, the connecting portion of the side forming blocks with the inner groove 22 cannot slide into the outer groove 21, thereby preventing the side forming blocks from being displaced left and right during the movement, and improving the accuracy.

As shown in fig. 4 and 5, a plurality of top blocks 23 capable of repeatedly moving back and forth along the vertical direction are further arranged in the wheel cover block 11, and at least two ejector rods 24 symmetrical along the center line of the top block 23 are arranged on the lower end surface of each top block 23. Because the automobile wheel cover formed on the wheel cover block 11 is an irregular plastic part and has a larger area, when the ejector rods 24 which are symmetrical along the center drive the ejector block 23 to eject the plastic part, the force generated by the contact surface of the ejector block 23 and the plastic part is uniformly distributed, and the plastic part is prevented from being punctured and damaged.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions for the specific embodiments described herein may be made by those skilled in the art without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Although the terms of the lower mold 10, the wheel house block 11, the forming surface 12, the side forming surface 13, the side forming block 14, the limiting block 15, the limiting cavity 16, the male snap block 17, the female snap groove 18, the positioning limiting groove 19, the snap block 20, the outer groove 21, the inner groove 22, the top block 23, the ejector pin 24, the side snap groove 25, the snap block groove 26, etc., are used more herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed in a manner that is inconsistent with the spirit of the invention.

Claims (10)

1. The utility model provides a non-uniform wall thickness automobile wheel casing precision injection moulding mould structure, includes lower mould (10), its characterized in that, lower mould (10) on be equipped with wheel casing piece (11) protruding in lower mould (10), wheel casing piece (11) on be equipped with lower shaping face (12) that are used for shaping automobile wheel casing inside surface, the both ends of shaping face (12) respectively be connected with one and set up side shaping face (13) on lower mould (10), be equipped with on every side shaping face (13) along the horizontal direction side shaping piece (14) that the front and back repeatedly moved, wheel casing piece (11) on still be equipped with can form the restriction piece (15) of joint with last mould.

2. The precise injection molding die structure for the automobile wheel cover with the non-uniform wall thickness as claimed in claim 1, wherein one end of the limiting block (15) connected with the wheel cover block (11) extends towards the direction far away from the wheel cover block (11), a limiting cavity (16) with an upward opening is arranged in the limiting block (15), and the cross-sectional area of the limiting cavity (16) is gradually reduced from the end far away from the wheel cover block (11) to the other end.

3. The precise injection molding die structure of the automobile wheel cover with the non-uniform wall thickness as claimed in claim 1, wherein the side forming blocks (14) are located at two ends of the lower die (10), the side forming blocks (14) and the lower die (10) form clamping connection and can move back and forth repeatedly along the horizontal direction, the end face, close to the lower die (10), of each side forming block (14) is provided with a convex clamping block (17), and two sides of the lower die (10) are respectively provided with a concave clamping groove (18) matched with the convex clamping block (17).

4. The precise injection molding die structure for the automobile wheel cover with the non-uniform wall thickness as claimed in claim 3, wherein when the male clamping blocks (17) extend into the corresponding female clamping grooves (18) and the end surfaces of the male clamping blocks (17) are completely contacted with the end walls of the female clamping grooves (18), gaps are formed between the side forming blocks (14) and the wheel cover blocks (11).

5. The precise injection molding die structure of the automobile wheel cover with the non-uniform wall thickness according to claim 3, wherein at least one side clamping groove (25) movably connected with the side forming block (14) is respectively arranged at two ends of the lower die (10), the side clamping groove (25) is clamped with the side forming block (14), the side clamping groove (25) is inclined, and the inclined side clamping groove (25) is inclined upwards from one end close to the wheel cover block (11) and extends towards the direction far away from the wheel cover block (11).

6. The precise injection molding die structure for the automobile wheel cover with the non-uniform wall thickness as claimed in claim 1, wherein a plurality of positioning limiting grooves (19) are respectively formed on two sides of the lower die (10), the positioning limiting grooves (19) are horizontally arranged, and the positioning limiting grooves (19) are also formed on two sides of the wheel cover block (11) and have gaps with the wheel cover block (11).

7. The precise injection molding die structure for the automobile wheel cover with the non-uniform wall thickness as claimed in claim 6, wherein the positioning limiting grooves (19) close to the limiting block (15) are provided with the fixture blocks (20), and the horizontal height of the fixture blocks (20) is higher than the height of the positioning limiting grooves (19) and lower than the horizontal height of the limiting block (15).

8. The precise injection molding die structure for wheel covers of vehicles with non-uniform wall thickness as claimed in claim 7, wherein said latch (20) is provided with a latch groove (26), said latch groove (26) is disposed along the vertical direction, and the cross-sectional area of said latch (20) is gradually reduced from the end near the limiting block (15) to the other end.

9. The precise injection molding die structure for the automobile wheel cover with the non-uniform wall thickness as claimed in claim 6, wherein the positioning limiting groove (19) comprises an outer groove (21) communicated with the external space, the end part of the outer groove (21) far away from the external space is communicated with an inner groove (22), and the cross-sectional area of the inner groove (22) is larger than that of the outer groove (21).

10. The precise injection molding die structure for the automobile wheel cover with the non-uniform wall thickness as claimed in claim 1, wherein a plurality of top blocks (23) capable of repeatedly moving back and forth along the vertical direction are further arranged in the wheel cover block (11), and at least two ejector rods (24) which are symmetrical along the central line of the top blocks (23) are arranged on the lower end face of each top block (23).

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