Rearview mirror product plastic mould develop

Rearview mirror product plastic mould develop

Rearview mirror product plastic mould develop introduction

1) Mirror ring
Product material: ABS
Number of cavities: 1+1
Adhesive mode: 2 points hot runner turn horn into the glue
2) Base
Product material: PP+GF45
Number of cavities: 1+1
Adhesive mode: cold runner side feed or 1 point hot mouth turn side feed
3) Mirror shell
Product material: ABS
Number of cavities: 1+1
Adhesive mode: 1 point hot runner to cold runner
4) bracket
Product material: ABS
Number of cavities: 1+1
Adhesive mode: 1 point open hot runner to cold runner side feed
5) Rotary axis
Product material: ABS
Number of cavities: 1+1
Adhesive mode: 1 point open hot runner to cold runner side feed
6) Mirror base
Product material: ABS
Number of cavities: 1+1
Adhesive mode: 1 point open hot runner to cold runner side feed
3. Rear view mirror mold structure introduction
1) Mirror ring
Mold structure: the mirror ring product is generally unstructured, and the mirror ring product of this model has no row inclined roof structure.
2) Base
Mold structure: the back mode oblique position
3) Mirror shell
Mold structure: rear die oblique row + rear die oblique top + oblique top + straight top combined structure
4) bracket
Mold structure: front mold tunnel oblique core + rear mold oblique line + rear mold straight top
5) Rotary axis
Mold structure: the back mode oblique line + the back mode inclined top
6) Mirror base
Mold structure: front mold tunnel oblique row + rear die oblique row + rear die oblique top
Automotive rear view mirror housing mold design summary
This mold adopts the demoulding mechanism of pusher + push block + oblique push block. This is the typical structure of the car mirror housing mold. It is necessary to pay attention to the design of this type of mold. This structure must be manually taken, hand-picked. When it is necessary to take out the parts, the plastic parts are manually removed. For such plastic parts, the plastic parts must have a swinging space. This type of plastic parts that are hand-pulled out are also used in automobile mold design, such as automobile steering column and throttle cover.
For the car mirror housing mold, pay attention to the design:
1. The plastic parting line is on R, and R is in the fixed mold. For this kind of R-half-open or three-seven-open mold, in order to make the appearance of the clamp line invisible, special attention should be paid to make the movable mold kernel 0.05-0.1mm, to avoid the difference of the plastic parts.
2. Fixed mold stop, fine positioning must be designed. Avoid misalignment of the fixed mold and prevent the plastic parts from appearing.
3. When the mold frame undercut 5 is designed as a push block structure, the piece must be taken by hand, and the plastic piece must have a swinging space when it is taken out.
4. Mirror shell mold fixed mold edge of the glue position due to the edge, must pay attention to protection in the mold production, it is best to use opaque adhesive tape to protect the gap during handling.
5. When designing the inclined slider that draws the core in the up and down direction of the Z axis, it is necessary to pay attention to the inclination of the front end of the inclined slider to be greater than or equal to the angle of the bottom surface of the inclined slider to avoid the reverse buckle.
6. The inclined slider cooling water, the design of the spring, etc. must be parallel with the core pulling angle of the inclined slider to facilitate the processing of the inclined slider. 3. When ordering the inclined slider, it is necessary to make the blank body according to the inclined direction of the inclined slider to facilitate subsequent processing.
7. The bottom of the wear block at the bottom of the inclined slider should be designed to be straight, and the wear block should be convex to avoid interference with the B plate and the stroke block of the inclined slider when the inclined slider is retracted.
8. Since the inclined slider should be installed with the fixed mold to save the clip, the slider needs to design the positioning of the mushroom head, and also pay attention to the design process screw, which is convenient for the fixed mold and the oblique slider to be installed together to save the clip.
Automotive rearview mirror bracket mold design summary
This mold adopts the demoulding mechanism of pusher + push block + push block. This is the typical structure of the car rear view mirror bracket mold. It is necessary to pay attention to the design of this type of mold. This structure must be manually taken, and manual picking is required. When the pieces are hand-cut out of the plastic parts, for such plastic parts, the plastic parts must have a swinging space. This type of plastic parts that are hand-pulled out are also used in automobile mold design, such as automobile steering column and throttle cover.
For the car rearview mirror bracket mold, pay attention to the design:
1. The plastic parting line is on R, and R is in the fixed mold. For this kind of R-half-open or three-seven-open mold, in order to make the appearance of the clamp line invisible, special attention should be paid to make the movable mold kernel 0.05-0.1mm, to avoid the difference of the plastic parts.
2. Fixed mold stop, fine positioning must be designed. Avoid misalignment of the fixed mold and prevent the plastic parts from appearing.
3. When the mold undercut 3, 4 is designed as a push block structure, it is necessary to take the piece manually, and the plastic part must have a swinging space when it is taken out.
4. Bracket mold fixed mold edge of the glue position due to sharp edges, must pay attention to protection in the mold production, it is best to use opaque adhesive tape to protect against collisions during the handling process.
5. Since the inclined slider should be installed with the fixed mold to save the clip, the slider needs to design the positioning of the mushroom head, and also pay attention to the design process screw, which is convenient for the fixed mold and the oblique slider to be installed together to save the clip.
Automotive rear view mirror base mold design summary
The mold adopts the demoulding system of push rod + push tube + machine and the temperature control system of "straight-flow water pipe + inclined water pipe + water well" and the inclined slider core-pulling system.
In the design of automotive mold temperature control system, there are mainly two combinations:
(1) The first combination form: straight-through water pipe + inclined water pipe + water well;
(2) The second combination form: straight-through water pipe + water well + inclined water pipe.
The difference between the two forms is that between the inclined water pipe and the well, the former is preferred to use inclined water pipes, while the latter is preferred to use water wells. These two combinations have different emphasis and therefore different effects.
The first form has the advantages of uniform cooling throughout the cavity, short forming cycle and high quality of plastic parts. It is suitable for molds with high requirements and high performance requirements, such as front and rear bumpers of automobiles, upper and lower dashboard bodies of automobiles. And the left and right door panels of the car and other interior and exterior molding molds. The disadvantage is that the processing cost is high, and it is mainly suitable for the molds of European and American customers.
The second form has the advantage of lower processing costs and convenient processing. The disadvantage is that too many design wells on the mold have a certain influence on the strength of the mold. The cavity cooling effect is worse than the first one, and it is applied more in Japanese and Chinese domestic automobile molds.
The mold is fixed by the fixed mold, and the insertion position is used to avoid the damage in production, and thus the insert is processed. The bone position of the moving mold larger than 10mm deep is used to avoid the difficulty of exhausting, avoiding the difficulty of filling, and also adopting the insert processing. Due to the special shape of the plastic part, in order to avoid the mold clamping of the plastic part, the mold is designed with a fixed-die spring block mechanism for fixing the plastic part, so that the plastic part remains in the movable mold, thereby avoiding the plastic part sticking. The phenomenon of fixed mode occurs.
Automotive rearview mirror base mold design summary
The mold adopts the demoping mechanism of “push rod + inclined top + spring + injection molding machine pull back type”, adopting the lateral core pulling structure of the fixed-mode tunnel inclined slider and the “slanting guide column + slider”. The slider has many holes and the core area is large, and the rubber surface of the slider needs to be processed by the skin pattern, and the appearance requirement is high. For this mold, the pre-deformation treatment of plastic parts is very important. To solve the warping deformation of plastic parts after forming, pre-deformation is a priority plastic processing technology. The appearance of the mold is required to be high, and the slider and the fixed mold are clamped together to save the mold, and the positioning of the slider needs to be stable and reliable. According to the experience, it is easy to be injured after the skin of the automobile plastic parts, and it is necessary to ensure that the angle of the leather strip is more than 5 degrees.
Due to the large number of sliders and the two fixed-die tunneling slides, there are many sliders and fixed-die inserts. Therefore, the mold process is more complicated. In addition to the ordinary machine tool processing, CNC and deep hole drilling are required. Axis CNC, spark machine, wire cutting and other high-precision machine tools to process. The production process is complicated and the production is difficult.
According to the structural characteristics of the rear view mirror mount, the material characteristics, the surface quality of the plastic parts and the batch requirements, the cold flow passage is designed to improve the fluidity of the molten plastic during the plastic injection moulding process and improve the plastic parts. The filling effect saves the flow channel system aggregate after molding, and at the same time improves the molding cycle of the plastic parts and improves the production efficiency of the plastic parts. Since the production of this mold, since the design of each mechanism is reasonable, the core is stable and reliable. The mold successfully used pre-deformation processing technology and mold flow analysis technology to solve the problem of warpage deformation of plastic parts, and obtained the customer's satisfaction evaluation. It is a successful example in recent production, which can be called the structure of automobile rearview mirror mold. Classic Case.

This is Rearview mirror product plastic mould develop

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