CN110406047B - Injection mold for bicolor car light lens - Google Patents
Injection mold for bicolor car light lens Download PDFInfo
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- CN110406047B CN110406047B CN201910821619.1A CN201910821619A CN110406047B CN 110406047 B CN110406047 B CN 110406047B CN 201910821619 A CN201910821619 A CN 201910821619A CN 110406047 B CN110406047 B CN 110406047B
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- 238000002347 injection Methods 0.000 title claims abstract description 64
- 239000007924 injection Substances 0.000 title claims abstract description 64
- 238000001746 injection moulding Methods 0.000 claims abstract description 120
- 239000000725 suspension Substances 0.000 claims abstract description 76
- 238000000034 method Methods 0.000 claims abstract description 17
- 230000008569 process Effects 0.000 claims abstract description 16
- 230000009471 action Effects 0.000 claims abstract description 15
- 238000007789 sealing Methods 0.000 claims description 18
- 230000007246 mechanism Effects 0.000 claims description 15
- 230000009977 dual effect Effects 0.000 claims 4
- 230000001360 synchronised effect Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 description 9
- 238000010586 diagram Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 239000002994 raw material Substances 0.000 description 4
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/16—Making multilayered or multicoloured articles
- B29C45/1615—The materials being injected at different moulding stations
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/26—Moulds
- B29C45/33—Moulds having transversely, e.g. radially, movable mould parts
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Non-Portable Lighting Devices Or Systems Thereof (AREA)
Abstract
The invention provides a double-color car light lens injection mold with a compact structure and high stability, which comprises a first fixed mold, a second fixed mold and two movable molds, wherein each movable mold comprises a body and a suspension core-pulling body, the suspension core-pulling bodies are connected to the body through elastic pieces, the elastic pieces are in a pre-tightening state, the first fixed mold and any movable mold are clamped and then are used for injecting a first color injection molding piece, the suspension core-pulling bodies are contained in grooves of the first fixed mold at the moment, after injection molding is completed, the first color injection molding piece is left on the movable mold, the second fixed mold and the movable mold carrying the first color injection molding piece are clamped for injecting a second color injection molding piece, a pushing part is arranged at a preset position of the second fixed mold, and in the clamping process, the pushing part pushes the suspension core-pulling bodies to an injection molding position and performs injection molding so as to form the double-color car light lens. The suspension core-pulling body is arranged on the movable die, so that the injection mold is compact in structure and small in size, and can automatically recover under the action of the elastic piece when the suspension core-pulling body is not pressed, and is stable and reliable.
Description
Technical Field
The invention belongs to the technical field of injection mold processing, and particularly relates to a double-color car light lens injection mold with a compact structure and high stability.
Background
The double-color mold is a mold in which two plastic materials are molded on the same injection molding machine and are molded in two times, but the product is only ejected once. In general, the molding process is also called two-material injection molding, and is usually completed by a set of molds, wherein the set of molds refers to a pair of molds consisting of a movable mold and a fixed mold I and another pair of molds consisting of another movable mold and a fixed mold II, wherein the two movable molds are identical, and a total of two pairs of molds form a set of molds, and a special two-color injection molding machine is needed.
Along with the rapid development of the car light industry, the appearance of the lamp is more and more glaring and changeable, and the bicolor mould is also increasingly widely applied to the injection molding process of car light lenses, so that the practicability and the attractiveness of plastic parts are improved. However, this method is expensive and requires a high technical requirement. Meanwhile, due to continuous rising of raw materials and labor cost, competing white heating and market trend, the injection mold for the car lamp part is compact in mold structure and reduced in mold size on the premise of guaranteeing the structural function, on one hand, the raw material cost can be reduced, on the other hand, the processing amount can be reduced, and the injection mold is an effective mode.
Disclosure of Invention
The invention aims to solve the problems, and aims to provide the double-color car light lens injection mold with compact structure and high stability.
The invention provides an injection mold for a double-color car light lens, which is used for injecting a double-color car light lens formed by a first color injection molding piece and a second color injection molding piece, and is characterized by further comprising two movable molds, wherein each movable mold comprises a body and a suspension core-pulling body, the suspension core-pulling body is connected to the body through an elastic piece, the elastic piece is in a pre-tightening state, the first fixed mold and any movable mold are matched for injecting the first color injection molding piece, the first fixed mold is provided with a groove for accommodating the suspension core-pulling body when the first color injection molding piece is matched, the first color injection molding piece is left on the corresponding movable mold after the injection molding is completed, the second fixed mold is matched with the movable mold carrying the first color injection molding piece for injecting the second color injection molding piece, the second fixed mold is provided with a pushing part at a preset position, and the pushing part pushes the suspension core-pulling body to an injection molding position in the process of the second fixed mold and the movable mold, so that a cavity matched with the second color injection molding piece is formed after the injection molding of the second color injection molding piece is completed.
The double-color car light lens injection mold provided by the invention can be characterized in that the two movable molds are connected with a rotating mechanism of an injection molding machine tool, the two movable molds are driven to rotate through the rotating mechanism to simultaneously perform position exchange between the first fixed mold and the second fixed mold, one of the two movable molds is used as the first movable mold, the other one of the two movable molds is used as the second movable mold, the first movable mold and the first fixed mold are matched to perform injection molding of a first color injection molding part, the first color injection molding part stays on the first movable mold after the first movable mold is opened, the first movable mold is driven to rotate to correspond to the second fixed mold through the rotating mechanism, the second movable mold corresponds to the first fixed mold, the first movable mold and the second fixed mold are matched to perform injection molding of a second color injection molding part, and meanwhile, the second movable mold and the first fixed mold are matched to perform injection molding of the first color injection molding part synchronously.
The injection mold for the double-color car light lens can also have the characteristics that the elastic piece is a spring, and when the first movable mold and the second fixed mold are closed, the pushing part pushes the suspension core-pulling body to enable the spring to be compressed until the suspension core-pulling body reaches an injection molding position, so that the closing operation is completed; when the first movable die and the second fixed die are opened, the suspended core-pulling body is restored to an initial state under the elastic action of the spring.
The injection mold for the double-color car light lens can be characterized in that the double-color car light lens is provided with a side concave structure between the bottom of a first color injection molding piece and a second color injection molding piece, the lower end of the side concave structure is longer than the upper end, when the first movable mold and the second fixed mold are closed, the suspension core-pulling body is propped against the bottom of the first color injection molding piece so as to perform injection molding of the second color injection molding piece, when the first movable mold and the second fixed mold are opened, the suspension core-pulling body is restored under the elastic action of the elastic piece, and the restoring direction of the suspension core-pulling body has a certain included angle with the demolding direction of the double-color car light lens, so that the suspension core-pulling body is restored under the elastic action of the elastic piece and simultaneously completes core pulling from the side concave structure.
The injection mold for the bicolor car light lens can also have the characteristic that the included angle ranges from 10 degrees to 15 degrees.
The injection mold for the double-color car light lens can also have the characteristic that the groove is arranged at a preset distance from the outside of the cavity of the first fixed mold, so that the sealing surface of the movable mold and the first fixed mold after the movable mold and the first fixed mold are clamped has a certain width.
Effects and effects of the invention
According to the injection mold for the double-color car lamp lens, the first fixed mold and one of the movable molds can be used for injection molding of the first color injection molding piece after being clamped, and the suspension core-pulling body on the movable mold is accommodated in the groove during clamping and does not participate in injection molding of the first color injection molding piece, so that the first fixed mold has a sufficient material sealing surface; after the injection molding of the first color injection molding piece is completed, the movable mold carries the first color injection molding piece to rotate to correspond to the second fixed mold and is clamped, in the clamping process, the pushing part of the second fixed mold pushes the suspension core-pulling body to the injection molding position, so that a cavity matched with the second color injection molding piece is formed, the suspension core-pulling body participates in the injection molding process of the second color injection molding piece, and a bicolor car light lens is formed after the injection molding is completed; according to the invention, the suspension core-pulling body is arranged on the movable die, so that the structure of the injection die is more compact, the size of the die is correspondingly reduced, the cost of raw materials is reduced, in addition, the suspension core-pulling body is connected to the body of the movable die through the elastic piece, the elastic piece is compressed when the pushing part pushes, and after the die is opened, the suspension core-pulling body automatically recovers under the elastic action of the elastic piece, so that the injection die is stable and reliable.
Drawings
Fig. 1 is a schematic structural view of a bi-color lamp lens in an embodiment of the present invention.
Fig. 2 is a schematic diagram showing a mold clamping state of a first fixed mold and a movable mold of a double-color lamp lens injection mold in an embodiment of the present invention.
Fig. 3 is a schematic diagram showing a mold clamping state of a second fixed mold and a movable mold of the injection mold of the double-color lamp lens in the embodiment of the invention.
Fig. 4 is a schematic diagram of the structure of the second fixed mold and the movable mold of the injection mold of the double-color lamp lens in the embodiment of the invention.
Detailed Description
The invention is further illustrated by means of the following examples, which are not intended to limit the scope of the invention.
< Example >
Fig. 1 is a schematic structural view of a bi-color lamp lens in an embodiment of the present invention.
Fig. 1 shows a bicolor car light lens, which is composed of a first color injection molding piece 11 and a second color injection molding piece 12, wherein in practical application, the first color injection molding piece 11 is a white piece, and the second color injection molding piece 12 is a black piece. In addition, the bicolor car light lens is provided with a undercut structure 13 between the bottom of the first color injection molding piece 11 and the second color injection molding piece 12, so that the bicolor car light lens cannot be normally demolding in the demolding direction, and core pulling is needed to be performed for normal demolding. In the present embodiment, the undercut structure 13 has a lower protruding length longer than an upper protruding length.
Fig. 2 is a schematic diagram showing a mold closing state of a first fixed mold and a movable mold of a double-color car light lens injection mold in an embodiment of the present invention; fig. 3 is a schematic diagram showing a mold clamping state of a second fixed mold and a movable mold of the injection mold of the double-color lamp lens in the embodiment of the invention.
As shown in fig. 2 and 3, the present embodiment provides a two-color lamp lens injection mold for injection molding the two-color lamp lens shown in fig. 1 after the injection mold is mounted on an injection molding machine. The injection mold includes a first stationary mold 21 (i.e., stationary mold I), a second stationary mold 22 (i.e., stationary mold II), and two movable molds 23.
Here, the mounting positions of the first and second fixed molds 21 and 22 on the injection molding machine are fixed, and the two movable molds 23 are mounted on the rotating mechanism of the injection molding machine, and are driven to rotate by the rotating mechanism, thereby realizing the station change.
In the present embodiment, the structures of the two movable molds 23 are identical, and only one of the movable molds 23 will be described in detail herein, and the detailed description of the other movable mold 23 will be omitted.
As shown in fig. 2 and 3, the movable mold 23 includes a body and a suspension core-pulling body 24, which are not shown in the drawings, and the suspension core-pulling body 24 is connected to the body through an elastic member, which is not shown in the drawings, and in this embodiment, the elastic member may be a spring. Specifically, the suspension core-pulling body 24 is fixed on the body through a limit screw and a spring, and in an initial state, the elastic member is in a pre-tightening state, that is, the spring is pre-pressed.
As shown in fig. 2, the first stationary mold 21 can be clamped with any one of the movable molds 23 for injection molding the first color injection molded article 11. The first fixed mold 21 has a groove 211, the groove 211 is disposed at a predetermined distance a from the outside of the cavity of the first fixed mold 21, and the size of the groove 211 is matched with the size of the floating core-pulling body 24, so as to accommodate the corresponding floating core-pulling body 24 when the first fixed mold 21 and the movable mold 23 are clamped, thereby avoiding interference. Here, the size of the groove 211 is slightly larger than that of the floating core-pulling body 24, so that the floating core-pulling body 24 can smoothly enter the groove 211 during mold closing, interference cannot occur, and when the floating core-pulling body 24 is in the groove 211, the floating core-pulling body is slightly spaced from the groove wall and the groove bottom surface, that is, is not in contact with the groove wall and the groove bottom surface. It can be seen that: the suspension core-pulling body 24 does not participate in the injection molding process of the first color injection molding 11. After the injection is completed, the first color injection part 11 rests on the corresponding movable mold 23.
In addition, the elastic member is in a pre-tightening state, that is, the suspension core-pulling body 24 is always in a spring-open state, mainly for ensuring the sealing effect when the first fixed mold 21 and the movable mold 23 are clamped and injection-molded into the first color injection molding member 11. The suspension core-pulling body 24 is designed to be in a spring-open state and enters the groove 211 on the first fixed die 21, so that space is reserved for the design of the material sealing surface on the first fixed die 21. Otherwise, if the suspension core-pulling body 24 is moved to the injection molding state under pressure at this time, the suspension core-pulling body 24 contacts with the cavity of the first color injection molding piece 11, and then no space is available for separately designing the sealing surface, that is, the suspension core-pulling body 24 is to participate in the injection molding sealing of the first color injection molding piece 11, so that the sealing effect of the first color injection molding piece 11 is poor and the material is easy to escape.
In order to ensure that the sealing surface 25 has sufficient sealing space, i.e. a certain width, the value of this width is the value of the predetermined distance a. The sealing surface 25 can be regarded as a plane and is basically perpendicular to the demolding direction, and when the movable mold 23 and the first fixed mold 21 are closed, the sealing effect of the sealing mode that the plane is in direct contact with the plane is good. In addition, in order to secure the sealing effect of the movable mold 23 and the first stationary mold 21, the width of the sealing surface 25 (i.e., the value of the preset distance a) is at least not lower than 2mm, wherein the effect is better when the width of the sealing surface 25 is 5mm or more.
As shown in fig. 3, the second stationary mold 22 can be clamped with a movable mold 23 that has completed injection of the first color injection part 11 for injection of the second color injection part 12. The second fixed mold 22 is provided with a pushing portion at a predetermined position, which is not shown in the drawing, and in this embodiment, the pushing portion is a body of the second fixed mold 22 itself, and the body of the second fixed mold 22 pushes the suspension core-pulling body 24 and maintains the pressure connection with the suspension core-pulling body 24.
In the process of closing the second fixed mold 22 and the corresponding movable mold 23, the pushing portion pushes the suspension core-pulling body 24 to a corresponding injection position, wherein the injection position specifically is: the suspension core-pulling body 24 is pushed to be in contact with the bottom of the first color injection molding 11. The suspension core-pulling body 24 is taken as a part of the movable mould 23 to form a cavity matched with the second color injection part 12 together with the second fixed mould 22, and can be seen: the suspension core-pulling body 24 participates in the injection molding process of the second color injection molding 12.
In the process of pushing the suspension core-pulling body 24 by the pushing part, the elastic piece is compressed by the suspension core-pulling body 24, and the suspension core-pulling body 24 moves along the compression direction of the elastic piece until the suspension core-pulling body 24 reaches an injection molding position, so that the die assembly operation of the movable die 23 and the second fixed die 22 is completed; when the corresponding movable mold 23 and the second fixed mold 22 are opened, the suspended core-pulling body 24 is restored to the initial spring-opened state along the direction opposite to the compressed direction of the elastic member under the elastic action of the elastic member, and the direction is the restoring direction of the suspended core-pulling body 24.
The two movable molds 23 are fixedly connected with a rotating mechanism on the injection molding machine tool, and the two movable molds 23 are driven to exchange positions between the first fixed mold 21 and the second fixed mold 22 through the rotation of the rotating mechanism.
Based on the injection mold shown in fig. 2 and 3, after the injection process of the first color injection molding 11 is completed and the mold is opened, the first color injection molding stays on the corresponding movable mold 23, then the movable mold 23 is rotated to correspond to the second fixed mold 22 under the action of the rotating mechanism, and the second color injection molding 12 is further injection molded after mold closing is performed, thereby forming a finished two-color lamp lens.
After the injection molding of the second color injection molding part 12 is completed, the suspension core-pulling body 24 is embedded in the side concave structure 13 of the bicolor car light lens, and the core-pulling step is needed to be carried out, so that the normal demolding of the bicolor car light lens can be ensured. In addition, during the mold opening process of the second fixed mold 22 and the corresponding movable mold 23, the suspended core-pulling body 24 is restored under the elastic action of the elastic member itself, and the initial spring-open state is restored, and the restoring direction is opposite to the direction in which the elastic member is compressed by the pushing portion. In order to ensure the normal demolding of the corresponding bicolor lamp lens, the restoring direction (i.e. the moving direction) of the suspension core-pulling body 24 is set to have a certain included angle B with the demolding direction of the bicolor lamp lens, so that the core-pulling action can be completed while the suspension core-pulling body 24 is restored. In this embodiment, the angle value of the included angle B is exemplified by 10 degrees.
Fig. 4 is a schematic diagram of the structure of the second fixed mold and the movable mold of the injection mold of the double-color lamp lens in the embodiment of the invention.
As shown in fig. 4, after the injection process of the second color injection molded article 12 is completed, the floating core back body 24 is restored in the restoration direction at the time of mold opening, and the core back operation can be performed in the core back direction, and finally the initial state shown in fig. 2, that is, the pop-open state is restored.
Specifically, the restoring process is a core pulling process, and the movement of the suspended core-pulling body 24 along the restoring direction can be decomposed into the movement in the horizontal direction and the movement in the vertical direction, so that the movement in the horizontal direction can realize that the suspended core-pulling body 24 completes core pulling. In the horizontal direction, the suspension core-pulling body 24 gradually escapes from the undercut structure 13, in the process, the force generated by the vertical movement of the suspension core-pulling body 24 makes the suspension core-pulling body 24 still push against the undercut structure of the second color injection molding piece of the dual-color car light lens, and the contact surface of the suspension core-pulling body 24 and the lower end of the undercut structure 13 is a push surface until the suspension core-pulling body 24 is completely separated from the undercut structure 13 after the mold opening distance between the movable mold 23 and the second fixed mold 22 is increased. Thus, the injection-molded bicolor car light lens is propped against the second fixed die 22 side through the suspension core-pulling body 24, the bicolor car light lens after die opening is further consolidated and can be left on the second fixed die 22, and the bicolor car light lens of a final finished product is ejected out by an ejection mechanism on the second fixed die 22.
By combining the concrete structure of the injection mold, the injection molding process of the bicolor car light lens by the injection mold is as follows:
first, one of the two identical movable molds 23 is used as a first movable mold, and the other is used as a second movable mold.
Next, the first movable mold and the first fixed mold 21 are clamped, the first color injection part 11 is injection-molded, and after the injection molding is completed, the mold opening operation is performed, and at this time, the first color injection part 11 remains stopped on the first movable mold.
And thirdly, the first movable mold carries the first color injection molding piece 11 to correspond to the second fixed mold 22 through rotation of the rotating mechanism, the second color injection molding piece 12 is further subjected to mold closing for injection molding, mold opening is performed after injection molding is completed, the suspension core-pulling body 24 is restored to an initial spring-open state and core-pulling is completed under the action of the elastic piece, and a finished product double-color car lamp lens formed by injection molding is ejected out of the mold by an ejection mechanism of the second fixed mold 22.
When the first movable mold is rotated to correspond to the second fixed mold 22, the second movable mold is also rotated to correspond to the first fixed mold 21, and therefore the first movable mold and the second fixed mold 22 can be clamped together, and the second movable mold and the first fixed mold 21 can be clamped together to mold the second color injection part 12, and simultaneously, the first movable mold and the second fixed mold 22 are clamped together to mold the first color injection part 11.
Then, the positions of the first movable mold and the second movable mold are exchanged again by the rotating mechanism, and the second color injection mold 12 is injection-molded by clamping the molds.
The above operations are repeatedly performed in this way, and the bicolor car light lens is continuously injection molded.
Effects and effects of the examples
According to the injection mold for the double-color car lamp lens, the first fixed mold and one of the movable molds can be used for injection molding of the first color injection molding piece after being clamped, and when the movable molds are clamped, the suspension core-pulling body on the movable mold is accommodated in the groove and does not participate in injection molding of the first color injection molding piece, so that the first fixed mold has a sufficient material sealing surface; after the injection molding of the first color injection molding piece is completed, the movable mold carries the first color injection molding piece to rotate to correspond to the second fixed mold and is clamped, in the clamping process, the pushing part of the second fixed mold pushes the suspension core-pulling body to the injection molding position, so that a cavity matched with the second color injection molding piece is formed, the suspension core-pulling body participates in the injection molding process of the second color injection molding piece, and a bicolor car light lens is formed after the injection molding is completed; according to the embodiment, the suspension core-pulling body is arranged on the movable die, so that the structure of the injection die is more compact, the die size is correspondingly reduced, the cost of raw materials is reduced, in addition, the suspension core-pulling body is connected to the body of the movable die through the elastic piece, the elastic piece is compressed when the pushing part pushes, and after the die is opened, the suspension core-pulling body automatically recovers under the elastic action of the elastic piece, so that the injection die is stable and reliable.
In this embodiment, since the lower end of the undercut structure of the bicolor lamp lens is longer than the upper end, if the suspension core-pulling body is arranged on the side of the fixed mold, the movement stroke of the suspension core-pulling body will be obviously increased, because the stroke of the suspension core-pulling body is determined by the lower end length of the undercut structure, and is irrelevant to the upper end, when the mold is opened, the distance that the suspension core-pulling body needs to pull the core must be greater than the lower end length of the undercut structure, so that the mold opening process cannot be interfered. On one hand, as the core pulling action stroke is increased, the stability of the structural movement of the suspension core pulling body is reduced; on the other hand, the structure and the size of the injection mold are increased, and the mold cost is increased. In this embodiment, the suspension core-pulling body is arranged on the side of the movable die, and the back-off can be realized only by a smaller stroke, because the stroke of the suspension core-pulling body is determined by the length of the upper end of the undercut structure, and is irrelevant to the lower end, when the die is opened, the distance that the suspension core-pulling body needs to pull the core is only larger than the length of the upper end of the undercut, so that the die opening process can be ensured not to be interfered.
In the embodiment, the included angle between the restoring direction of the suspension core-pulling body and the demolding direction of the bicolor car light lens is 10 degrees; in the invention, the range of the included angle is 10-15 degrees, and the back-off of loose core can be realized.
While specific embodiments of the invention have been described above, it will be appreciated by those skilled in the art that this is by way of example only, and the scope of the invention is defined by the appended claims. Various changes and modifications to these embodiments may be made by those skilled in the art without departing from the principles and spirit of the invention, but such changes and modifications fall within the scope of the invention.
Claims (5)
1. An injection mold for a bicolor car lamp lens, which is used for injecting a bicolor car lamp lens consisting of a first color injection molding piece and a second color injection molding piece, comprises a first fixed mold and a second fixed mold, and is characterized in that,
The device also comprises two movable moulds, each movable mould comprises a body and a suspension core-pulling body, the suspension core-pulling body is connected to the body through an elastic piece, the elastic piece is in a pre-tightening state,
Wherein the first fixed die and any movable die are clamped for injection molding of the first color injection molding piece, the first fixed die is provided with a groove for accommodating the suspension core-pulling body during clamping, after injection molding is completed, the first color injection molding piece is left on the corresponding movable die,
The second fixed die and the movable die carrying the first color injection part are clamped for injection molding of the second color injection part, a pushing part is arranged at a preset position of the second fixed die, and in the process of clamping the second fixed die and the movable die, the pushing part pushes the suspension core-pulling body to an injection molding position, so that a cavity matched with the second color injection part is formed, and the second color injection part forms the bicolor car light lens after injection molding is completed;
one of the two movable molds is used as a first movable mold, the other is used as a second movable mold,
The bicolor car light lens is provided with a side concave structure between the bottom of the first color injection molding piece and the second color injection molding piece, the lower end of the side concave structure is longer than the upper end,
When the first movable die and the second fixed die are clamped, the suspension core-pulling body is propped against the bottom of the first color injection molding piece, so that the second color injection molding piece is injection molded,
When the first movable die and the second fixed die are opened, the suspension core-pulling body is restored under the elastic action of the elastic piece, and a certain included angle is formed between the restoration direction of the suspension core-pulling body and the demolding direction of the bicolor car light lens, so that the suspension core-pulling body is restored under the elastic action of the elastic piece and simultaneously completes core pulling from the undercut structure.
2. The dual color vehicle lamp lens injection mold of claim 1, wherein:
wherein,
The two movable molds are connected with a rotating mechanism of an injection molding machine tool, the two movable molds are driven to rotate through the rotating mechanism to simultaneously perform position exchange between the first fixed mold and the second fixed mold,
The first movable mould and the first fixed mould are matched to carry out injection molding on the first color injection molding piece, the first color injection molding piece stays on the first movable mould after the mould is opened,
The first movable die is driven to rotate to correspond to the second fixed die by the rotating mechanism, and the second movable die corresponds to the first fixed die,
The first movable die and the second fixed die are clamped for injection molding of the second color injection molding piece, and meanwhile, the second movable die and the first fixed die are clamped for synchronous injection molding of the first color injection molding piece.
3. The dual color vehicle lamp lens injection mold of claim 1, wherein:
wherein,
The elastic piece is a spring, and the elastic piece is a spring,
When the first movable die and the second fixed die are clamped, the pushing part pushes the suspension core-pulling body to compress the spring until the suspension core-pulling body reaches an injection molding position, so that the clamping operation is completed;
When the first movable die and the second fixed die are opened, the suspended core-pulling body is restored to an initial state under the elastic action of the spring.
4. The dual color vehicle lamp lens injection mold of claim 1, wherein:
wherein,
The included angle is in the range of 10-15 degrees.
5. The dual color vehicle lamp lens injection mold of claim 4, wherein:
wherein,
The groove is arranged at a preset distance away from the outer side of the cavity of the first fixed die, so that the sealing surface of the movable die and the sealing surface of the first fixed die after the movable die and the first fixed die are clamped has a certain width.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821619.1A CN110406047B (en) | 2019-09-02 | 2019-09-02 | Injection mold for bicolor car light lens |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910821619.1A CN110406047B (en) | 2019-09-02 | 2019-09-02 | Injection mold for bicolor car light lens |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110406047A CN110406047A (en) | 2019-11-05 |
| CN110406047B true CN110406047B (en) | 2024-08-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910821619.1A Active CN110406047B (en) | 2019-09-02 | 2019-09-02 | Injection mold for bicolor car light lens |
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| CN111906997A (en) * | 2020-08-13 | 2020-11-10 | 宁海县第一注塑模具有限公司 | Double-color mold with cavity moving along with rotation of movable mold |
| CN114750362A (en) * | 2021-12-28 | 2022-07-15 | 常州星宇车灯股份有限公司 | Penetrating type tail lamp cover inverted mold mechanism and lamp cover injection molding process |
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