Mold structure with in-mold lens ejector block

Abstract

The utility model provides a mould structure with an in-mould lens ejector block, which comprises a base, a mould and an ejector block, the mould is provided with a cavity, the cavity comprises an upper cavity and a lower cavity which are communicated with each other, the lower part of the lower cavity is communicated with a placing cavity, the area of the cross section of the placing cavity is gradually increased from bottom to top, and the placing cavity is of an inverted trapezoidal structure; wherein the top block can be connected with the placing cavity in a matched mode, so that when the top block is installed in the placing cavity from top to bottom and abuts against the placing cavity in a limited mode, the top end of the top block exactly forms the bottom of the lower cavity, the lower cavity and the placing cavity are separated in a sealed mode, the bottom side of the top block is further connected with a plurality of first ejector pins, and the first ejector pins are used for ejecting the top block out from bottom to top; the top end of the ejector block serves as a bottom plate and also serves as a main body contact surface for ejecting the lens product, so that the quality problem of deformation during ejection of the deformed lens product is avoided, the reject ratio of the lens product is reduced, the production and processing cost is reduced, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to mould technical field, specifically, relate to a mould structure with in-mould lens top block. BACKGROUND

[0002] At present, the conventional transparent lens adopts the ejector pin to directly eject, the product is easy to be deformed due to too small contact surface, and the nonconformities rate is high, the product processing cost is high, and the market product cost reduction demand cannot be met.

[0003] Therefore, the applicant specifically proposes the present application after researching the prior art. CONTENT OF UTILITY MODEL

[0004] The utility model provides a mould structure with in-mould lens top block, and the mould structure avoids that the ejector pin directly contacts the lens product to carry out ejection demoulding, thereby greatly reducing the ejection deformation probability of the lens product when demoulding, improving production efficiency and reducing product cost, and meeting the market capacity and reducing product cost demand.

[0005] To solve the above technical problem, the utility model provides a mould structure with in-mould lens top block, including base and the mould of setting on the base, be provided with cavity on the mould, the cavity includes upper chamber and lower chamber, the lower chamber is below the intercommunication provided with the placing cavity, the cross section area of placing cavity gradually increases from below to above, still include top block, the top block is constructed with placing cavity can be adapted to connect, when the top block is from above and is loaded into placing cavity and with its limit and reaches when the top block's top end forms the bottom of lower chamber, the bottom side of top block still is connected and is provided with first ejector pin, and first ejector pin is used for top block and is ejected from below to above.

[0006] As further optimization, the placing cavity is inverted trapezoidal structure.

[0007] As further optimization, the cross section of the upper chamber is greater than the cross section of the lower chamber, and a boss portion is arranged between the side wall of the lower chamber and the side wall of the upper chamber.

[0008] As further optimization, a plurality of top holes are arranged through the bottom end of the boss portion, and a second ejector pin is slidably connected in the top hole.

[0009] As further optimization, the top holes are four, and are arranged at four corners of the boss portion.

[0010] As further optimization, the first ejector pin is two, and is symmetrically arranged at both sides of the bottom end of the top block.

[0011] As further optimization, the mold is provided with two cavities; an injection cavity is further provided, the injection cavity is provided with two connecting holes respectively communicating with the two cavities, and an injection hole is further provided.

[0012] By adopting the technical scheme, the following technical effects can be achieved:

[0013] The mold structure with the in-mold lens top block provided by the application comprises a base, a mold and a top block, the mold is provided with a cavity, the cavity comprises an upper cavity and a lower cavity which are connected in communication, a placing cavity is connected in communication below the lower cavity, the cross-sectional area of the placing cavity gradually increases from bottom to top and forms an inverted trapezoidal structure; wherein the top block is configured to be adaptively connected with the placing cavity, so that when the top block is loaded into the placing cavity from top to bottom and abuts against the limit of the placing cavity, the top end of the top block just forms the bottom of the lower cavity, the lower cavity and the placing cavity are sealed and separated, and the bottom side of the top block is further connected with a plurality of first ejector pins, the first ejector pins are used to eject the top block from bottom to top, the top end of the top block is used as a bottom plate and a main contact surface for ejecting the lens product, the quality problem of deformation of the lens product caused by deformation during ejection is avoided, the defective rate of the lens product is reduced, the production and processing costs are further reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the application, and therefore should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.

[0015] Figure 1 is a top view structural schematic diagram of the mold structure with the in-mold lens top block of the application;

[0016] Figure 2 is a sectional view schematic diagram of the application at A-A; Figure 1

[0017] Figure 3 is an enlarged schematic diagram of B in the application; Figure 2

[0018] Figure 4 is a three-dimensional structural schematic diagram of the mold structure with the in-mold lens top block of the application;

[0019] Figure 5 is a structural schematic diagram of the top block of the application;

[0020] ​​Marked in the figure: 1, base; 2, mold; 3, lens product; 4, cavity; 5, upper cavity; 6, lower cavity; 7, placement cavity; 8, top block; 9, first ejector pin; 10, boss part; 11, top hole; 12, second ejector pin; 13, injection cavity; 14, injection hole; 15, connecting hole. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only to represent selected embodiments of the present application. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] As shown in Figures 1 to 5 The embodiments of the present application provide a mold structure with in-mold lens top block, comprising a base 1 and a mold 2 arranged on the base 1, the mold 2 is provided with a cavity 4, the cavity 4 comprises an upper cavity 5 and a lower cavity 6 connected in communication, wherein the cross section of the upper cavity 5 is larger than the cross section of the lower cavity 6, the lower cavity 6 is provided with a placement cavity 7 in communication below, the cross section area of the placement cavity 7 gradually increases from bottom to top, and the placement cavity 7 is in inverted trapezoidal structure in the embodiment; further comprising a top block 8, the top block 8 is configured to be adapted to be connected with the placement cavity 7 and is also arranged in inverted trapezoidal structure, due to the inverted trapezoidal structure, the side wall of the top block 8 can be limited to abut against the side wall of the placement cavity 7 due to the inclination, when the top block 8 is loaded into the placement cavity 7 from top to bottom and limited to abut against the placement cavity 7, the top end of the top block 8 just forms the bottom of the lower cavity 6, so as to seal and separate the lower cavity 6 and the placement cavity 7, wherein the upper end of the cavity 4 is further provided with a top cover (not shown in the figure) to seal the cavity 4 during injection, which will not be described here, so that the top block 8 is used as the bottom / bottom plate of the cavity 4 to form a complete cavity 4. Further, the bottom side of the top block 8 is further connected with a first ejector pin 9, the first ejector pin 9 is used to eject the top block 8 from bottom to top, since the top end of the top block 8 is used as the bottom plate, the top end of the top block 8 is just the bottom end main contact surface of the lens product 3, so that the lens product 3 is ejected from the cavity 4 by the top block 8, which can avoid deformation, so as to reduce the defective rate of the lens product 3, and further reduce the production and processing cost.

[0023] In one embodiment, a boss 10 is provided between the side wall of the lower cavity 6 and the side wall of the upper cavity 5, and the space above the boss 10 can form the edge portion of the lens product 3 of this embodiment after injection molding.

[0024] Preferably, the bottom end of the boss portion 10 is provided with multiple top holes 11, and a second ejector pin 12 is slidably connected in the top holes 11. Since the main body of the lens product 3 has been ejected by the top block 8 to avoid deformation, multiple ejector pins are used to further assist in ejection at the edge of the product, thereby avoiding problems such as adhesion between the lens product 3 and the cavity 4.

[0025] Furthermore, the lens product 3 has a rectangular cross-section, and four top holes 11 are provided on the boss portion 10, respectively located at the four corners of the boss portion 10. By placing the top holes 11 at the corners, the corners of the lens product 3 that are not easily deformed can be ejected, thereby assisting in demolding.

[0026] Preferably, two first ejector pins 9 are provided and symmetrically fixedly connected to both sides of the bottom end of the ejector block 8. In this way, when the two first ejector pins 9 push the ejector block 8 to move outward, the ejector block 8 can be kept in a horizontal and balanced state, thereby avoiding poor demolding effect caused by tilting. In addition, when reinstalled into the placement cavity 7, the fitting effect between the ejector block 8 and the placement cavity 7 is guaranteed, and a large gap is avoided between the lower cavity 6 and the ejector block 8, which would affect the shape of the injection-molded lens product 3.

[0027] During ejection, the first ejector pin 9 and the second ejector pin 12 can be moved simultaneously by the drive mechanism to eject the lens product 3, or the base 1 can be moved relative to the ejector pin by the drive mechanism while it is fixed. Both methods are acceptable and will not be elaborated here.

[0028] Preferably, the mold 2 has two cavities 4; it also has an injection cavity 13, which has two connecting holes 15 that connect the two cavities 4 respectively, and an injection hole 14. By setting two cavities 4, the production efficiency of a single mold 2 is increased. During injection molding, the injection material is injected into the injection cavity 13 through the injection hole 14, and then guided through the injection cavity 13 to the cavity 4 through the connecting holes 15 to complete the injection molding. The diameter of the connecting hole 15 gradually increases near the end of the cavity 4, so that the material can be more easily guided to fill the cavity 4 during injection molding. Finally, after holding pressure, a high-quality lens product 3 is formed.

[0029] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A mold structure with an in-mold lens top block, comprising a base and a mold disposed on the base, characterized in that, The mold has a cavity, which includes an upper cavity and a lower cavity. A placement cavity is connected to the lower cavity, and the cross-sectional area of ​​the placement cavity gradually increases from bottom to top. The mold also includes a top block, which is configured to fit and connect with the placement cavity. When the top block is inserted into the placement cavity from top to bottom and abuts against its limiting position, the top of the top block forms the bottom of the lower cavity. A first ejector pin is also connected to the bottom side of the top block, and the first ejector pin is used to push the top block out from bottom to top.

2. The mold structure with an in-mold lens top block according to claim 1, characterized in that... The placement cavity has an inverted trapezoidal structure.

3. The mold structure with an in-mold lens top block according to claim 1, characterized in that... The cross-section of the upper cavity is larger than the cross-section of the lower cavity, and a boss is provided between the side wall of the lower cavity and the side wall of the upper cavity.

4. The mold structure with an in-mold lens top block according to claim 3, characterized in that... The bottom end of the boss is provided with multiple top holes, and a second pin is slidably connected in the top holes.

5. A mold structure with an in-mold lens top block according to claim 4, characterized in that... The top hole is provided in four places, and is respectively located at the four corners of the boss portion.

6. A mold structure with an in-mold lens top block according to claim 1, characterized in that... There are two first ejector pins, which are symmetrically arranged on both sides of the bottom end of the top block.

7. A mold structure with an in-mold lens top block according to claim 1, characterized in that... The mold has two cavities; it also has an injection cavity, which has two connecting holes that connect the two cavities respectively, and an injection hole.

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