CN210082315U

CN210082315U - Core-pulling pouring gate structure for molding lens

Info

Publication number: CN210082315U
Application number: CN201920777926.XU
Authority: CN
Inventors: 郎雄; 赵东鹏; 王凯
Original assignee: HASCO Vision Technology Co Ltd
Current assignee: HASCO Vision Technology Co Ltd
Priority date: 2019-05-28
Filing date: 2019-05-28
Publication date: 2020-02-18
Anticipated expiration: 2029-05-28

Abstract

The utility model relates to a runner structure of loosing core for shaping lens, its movable mould core is inserted and is fixed on the movable mould frame, push up to one side loose core inlay install in movable mould core insert and with the movable mould core inserts sharp sliding connection, the movable mould core insert with push up to one side to loose core the shaping surface of constituteing the terrace die jointly, wherein one side of pushing up to one side loose core corresponds the lateral surface that forms the welding foot of car light lens and the eaves limit bottom surface that borders on with the welding foot lateral surface respectively with the top surface, be equipped with the U-shaped runner in pulling core to one side, the import of U-shaped runner is seted up on the top surface of pulling core to one side, the export of U-shaped runner is the runner, the lower part at the top edge face of the above-mentioned. The utility model discloses can avoid leaving the runner vestige on the outward appearance face of car light lens, show the appearance quality who improves the lens.

Description

Core-pulling pouring gate structure for molding lens

Technical Field

The utility model relates to an injection mold runner structure for shaping car lens belongs to the car light and makes technical field.

Background

The most demanding part of the present appearance of automobiles is the lamp, and the lens of the lamp is one of the most important parts of all appearance parts in the lamp. Common materials for lenses include PMMA (polymethyl methacrylate) and PC (polycarbonate). During the injection molding process, the material flows into the mold cavity through the gate. The gate is usually in the form of a point gate, a side gate and the like, the gate has the advantages of simple structure, easiness in processing, easiness in arrangement of the gate and the like, but the defect is also obvious, and after the gate is separated from a product, the gate leaves an obvious mark on the main appearance surface of the product, so that the common gate design can not meet the requirement of a host factory on the appearance requirement of the vehicle lamp lens.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a runner structure of loosing core for shaping lens can avoid leaving the runner vestige on the outward appearance face of car light lens, consequently is showing the appearance quality who improves the lens.

The utility model discloses a main technical scheme has:

a core-pulling pouring gate structure for molding a light distribution lens comprises a movable die frame, a movable die core insert, an inclined top core-pulling body and an inclined top ejector rod, wherein the movable die core insert is fixed on the movable die frame, the inclined top core-pulling body is embedded in the movable die core insert and is in linear sliding connection with the movable die core insert, the top surface of the inclined top core-pulling body is positioned on a parting surface, the movable die core insert and the inclined top core-pulling body jointly form a molding surface of a male die, one side surface and the top surface of the inclined top core-pulling body respectively correspond to an outer side surface of a welding foot of the vehicle lamp light distribution lens and a brim bottom surface adjacent to the outer side surface of the welding foot, a U-shaped flow passage is arranged in the inclined top core-pulling body, an inlet of the U-shaped flow passage is arranged on the top surface of the inclined top core-pulling body, an outlet of the U-shaped flow passage is a, the bottom of the U-shaped runner is lower than the sprue, the inclined top ejector rod penetrates through the movable mould frame and the movable mould core insert in an inclined and upward mode and is in sliding connection with the movable mould frame and the movable mould core insert, the top end of the inclined top ejector rod is fixedly connected with the inclined top loose core, and the inclined top loose core is in sliding connection with the movable mould core insert along the extending direction of the inclined top ejector rod.

The gate is preferably rectangular.

The height of the gate may be between 1.5 and 2mm and the length between 6 and 8 mm.

The cross-sectional area of the U-shaped flow passage preferably decreases from the inlet to the outlet.

The bottom of the U-shaped flow channel is preferably flat.

The part of the U-shaped flow passage from the end of the bottom to the outlet preferably extends straight upwards at an angle of 30-50 degrees relative to the parting plane.

The thinnest part of the inclined top loose core above the U-shaped flow channel is not less than 3 mm.

The gate is preferably provided in a lateral middle portion of an upper edge of the side face of the pitched roof core puller.

The demolding angle of the inclined top core pulling in the core pulling direction is preferably set to be more than 15 degrees.

The utility model has the advantages that:

the utility model discloses with the runner design on the die cavity that is used for shaping car light lens welding foot lateral surface, because the welding foot lateral surface is not the outward appearance face of car light lens, so can thoroughly solve traditional runner design and can leave the problem of vestige on the product outward appearance face, consequently can effectively improve the outward appearance of car light lens product, promote the quality of product.

The utility model discloses cooperation adopts the structure of loosing core to one side on formula of hiding side runner basis, when loosing core the backset, can be together ejecting with the runner of product together with the condensation, has both realized formula of hiding runner design, has realized the drawing of patterns of runner again.

The utility model discloses an optimal design to the size of formula of hiding side runner, position etc. had both satisfied the requirement of moulding plastics, can ensure again to have sufficient intensity of loosing core when product and runner drawing of patterns.

The utility model discloses can also use on the production of other injection molding products that have similar structural feature.

Drawings

Fig. 1 is a schematic cross-sectional view of an embodiment of the present invention;

FIG. 2 is a schematic view of a partial assembly of an embodiment of the present invention;

fig. 3 is a schematic view of a partial assembly structure of a mold according to an embodiment of the present invention.

Reference numerals: 1. a welding foot of the lens; 2. obliquely ejecting and pulling cores; 3. a flow channel; 4. parting surfaces; 5. obliquely ejecting a top rod; 6. a machine tool top column; 7. a base plate; 8. square iron; 9. an ejector plate backing plate; 10. an ejector plate; 11. moving the mold frame; 12. a movable mould core insert; 13. and obliquely ejecting the base sliding block.

Detailed Description

The utility model discloses a sprue structure of loosing core for shaping lens, as shown in figures 1, 2 and 3, comprising a movable mould frame 11, a movable mould core insert 12, an inclined top loose core 2 and an inclined top mandril 5, wherein the movable mould core insert is fixed on the movable mould frame, the inclined top loose core is embedded and installed in the movable mould core insert and is in linear sliding connection with the movable mould core insert, the top surface of the inclined top loose core is positioned on a parting surface 4, the movable mould core insert and the inclined top loose core jointly form the shaping surface of a convex mould for jointly forming the inner surface of the lens of the vehicle lamp, wherein one side surface and the top surface of the inclined top loose core respectively correspond to the outer side surface of a welding foot 1 of the lens of the vehicle lamp and the brim bottom surface adjacent to the outer side surface of the welding foot, a U-shaped runner 3 is arranged in the inclined top loose core, the inlet of the U-shaped runner is arranged on the top surface of the inclined top, the utility model discloses a core pulling device, including U-shaped runner, movable mould frame, movable mould core, oblique top ejector pin, movable mould frame and movable mould core insert and with their sliding connection, the top of oblique top ejector pin with the oblique top is loosed core fixed connection, the oblique top loose core with the movable mould core insert the edge to the extending direction sliding connection of oblique top ejector pin.

Fig. 3 shows the assembly relationship with other related parts when the utility model is used for the mold: the bottom end of the inclined top ejector rod is fixedly connected with the inclined top base sliding block 13, and the inclined top base sliding block is in sliding connection with the ejector plate 10 left and right. The movable mould frame 11, the movable mould core insert 12, the inclined top core-pulling 2, the inclined top ejector rod 5 and the inclined top base sliding block 13 jointly form the main part of the inclined top core-pulling mechanism.

The square iron 8 is fixed between the movable mould frame and the bottom plate 7, the square iron is supported at the edge of the bottom surface of the movable mould frame, a space is formed between the movable mould frame and the bottom plate, the ejector plate backing plate 9 is fixedly connected with the ejector plate 10, the movable mould frame and the bottom plate are in vertical sliding connection in the space, and the inclined ejector base sliding block 13 is fixed on the ejector plate. A push plate guide post (not shown) is further fixed between the movable die frame and the bottom plate, and the ejector plate is guided by the push plate guide post when moving up and down.

When the mold is closed, the parting surface 4 of the fixed mold and the movable mold is compacted and sealed, and the molten material flow enters the mold cavity through the runner 3. As shown in fig. 3, after the product is injected and molded, the machine tool applies an upward acting force to the machine tool ejection column 6 to force the machine tool ejection column to drive the ejector plate base plate and the ejector plate to move upwards synchronously, the inclined ejector base slider can slide rightwards while moving upwards, the inclined ejector base slider drives the inclined ejector rod and the inclined ejector core-pulling to move upwards, the inclined ejector core-pulling pushes the product upwards to pull out the runner from the side upper part, so that the runner can be smoothly ejected out of the mold when being ejected, and then the mechanical arm takes out the product.

The runner is preferred to be rectangle, compares circular, oval or other irregular runner shapes, and the narrow, long structural feature of the lateral surface that more is fit for lens welding foot on the one hand, on the other hand more is favorable to guaranteeing reasonable injection pressure and pressurize ability to guarantee product quality.

Further, the height H of the gate is preferably between 1.5 and 2mm, and the length is preferably between 6 and 8 mm. The size of the gate needs to ensure a proper gate area and certain ejection strength, so that the gate is prevented from being broken during ejection, the gate can be specifically adjusted according to the size of a product, and the final size can be analyzed, verified and determined by adopting the Mold Flow to ensure the design correctness of the submarine gate.

The cross-sectional area of the U-shaped flow passage is gradually reduced from the inlet to the outlet. In order to adapt to a small-size gate, the flow channel is made into a gradual change form, so that the flow channel can be smooth and smooth as much as possible, and the flow resistance and the shear stress are further reduced.

The bottom of the U-shaped flow channel can be a flat bottom.

The U-shaped flow channel extends upwards in a straight line at an inclination angle of 30-50 degrees relative to the parting plane from the end of the flat bottom to the part between the outlets.

Along with the mold opening and closing movement of the mold, the inclined ejection core pulling has the function of core pulling and also has the function of ejecting a plastic part. The thinnest part T of the part of the inclined top core pulling above the U-shaped flow channel is preferably not less than 3mm, so that the core pulling ejection strength is sufficient.

The sprue is preferably arranged in the transverse middle of the upper edge of the side face of the pitched roof core pulling device, so that on one hand, equal-length flow length is realized, pressure maintaining pressure in different directions after the sprue enters a cavity is more uniform and consistent, uneven volume shrinkage is avoided, and product quality is improved.

The ejector angle of the pitched roof core back in the core back direction is preferably set to 15 degrees or more to prevent the gate from being snapped at the time of ejection.

The utility model discloses a runner structure of loosing core had both solved the problem that adopts traditional runner structure to leave the vestige on product appearance face, effectively improved the outward appearance of car light lens product, promoted the quality of product, had solved the runner demolding problem of following along with living again, compared other demolding modes and simplified the mould structure, had improved the operational reliability of mould.

Claims

1. The utility model provides a runner structure of loosing core for shaping lens which characterized in that: the core pulling device comprises a movable mould frame, a movable mould core insert, an inclined top core pulling body and an inclined top ejector rod, wherein the movable mould core insert is fixed on the movable mould frame, the inclined top core pulling body is embedded and installed in the movable mould core insert and is in linear sliding connection with the movable mould core insert, the top surface of the inclined top core pulling body is positioned on a parting surface, the movable mould core insert and the inclined top core pulling body jointly form a molding surface of a male mould, one side surface and the top surface of the inclined top core pulling body respectively correspond to the outer side surface of a welding foot of a car lamp lens and the cornice bottom surface adjacent to the outer side surface of the welding foot, a U-shaped runner is arranged in the inclined top core pulling body, the inlet of the U-shaped runner is arranged on the top surface of the inclined top core pulling body, the outlet of the U-shaped runner is a pouring gate, the pouring gate is arranged on the lower part of the upper edge, the inclined top ejector rod obliquely and upwards penetrates through the movable mould frame and the movable mould core insert and is in sliding connection with the movable mould frame and the movable mould core insert, the top end of the inclined top ejector rod is fixedly connected with the inclined top loose core, and the inclined top loose core is in sliding connection with the movable mould core insert along the extending direction of the inclined top ejector rod.

2. The core back gate structure for molding a lens according to claim 1, wherein: the gate is rectangular.

3. The core back gate structure for molding a lens according to claim 2, wherein: the height of the gate is between 1.5 and 2mm, and the length of the gate is between 6 and 8 mm.

4. The core back gate structure for molding a lens according to claim 1, wherein: the cross-sectional area of the U-shaped flow passage is gradually reduced from the inlet to the outlet.

5. The core back gate structure for molding a lens according to claim 4, wherein: the bottom of the U-shaped flow passage is a flat bottom.

6. The core back gate structure for molding a lens according to claim 5, wherein: the U-shaped flow channel extends upwards in a straight line at an inclined angle of 30-50 degrees relative to the parting surface from the tail end of the bottom to the part between the outlets.

7. The core back gate structure for molding a lens according to claim 6, wherein: the thinnest part of the inclined top loose core above the U-shaped flow channel is not less than 3 mm.

8. The core back gate structure for molding a lens according to claim 1, wherein: the pouring gate is arranged in the transverse middle of the upper edge of the side face of the inclined top core pulling device.

9. The core back gate structure for molding a lens according to claim 1, wherein: the U-shaped flow channel extends upwards in a straight line in an inclined mode at an included angle of 30-50 degrees relative to the parting plane from the tail end of the bottom to the outlet, and the thinnest part of the part, located above the U-shaped flow channel, of the inclined top core pulling is not smaller than 3 mm.

10. The core gate structure for molding a lens of claim 1, 2, 3, 4, 5, 6, 7, 8, or 9, wherein: the mold stripping angle of the inclined top core pulling in the core pulling direction is set to be more than 15 degrees.