Large-size mold insert assembly structure and injection mold thereof

Abstract

The present application relates to a large-size mold insert assembly structure and injection mold thereof, comprising a first mold insert, a second mold insert and a plurality of blocks, the two opposite sides of each block are provided with a positioning groove, the two groove walls of the positioning groove are inclined, so that the positioning groove is approximately V-shaped, the opposite sides of the first mold insert and the second mold insert are provided with a plurality of positioning grooves, the two side walls of the positioning groove are oppositely inclined, when the first mold insert and the second mold insert are oppositely combined, the positioning groove on the first mold insert and the positioning groove on the second mold insert are combined into a block groove, the block is inserted into the block groove and fixed with the first mold insert and the second mold insert, and the side of the block is closely attached to the groove wall of the block groove. The present application reduces the size of the mold insert, facilitates machining and polishing, and ensures machining accuracy; the two side walls of the block are inclined to form a butterfly-shaped block, which ensures accurate positioning and accurate product forming.

Description

TECHNICAL FIELD

[0001] The present application relates to a large-size mold insert assembly structure and an injection mold thereof, and belongs to the technical field of injection molds. BACKGROUND

[0002] A charging pile is a power supplementing device for electric vehicles, which is similar to a fuel dispenser in a gas station, can be fixed to the ground or wall, and is installed in public buildings (charging stations, shopping malls, public parking lots, etc.) and residential parking lots. It can charge various types of electric vehicles according to the adjustment of voltage and current. The charging pile generally provides two charging modes of conventional charging and fast charging. People can use a specific charging card on the human-computer interaction operation interface provided by the charging pile to use the card, perform corresponding charging operations and fee data printing, and the charging pile display screen can display data such as charging capacity, cost, and charging time.

[0003] The charging pile includes a rear shell. In the prior art, the rear shell of the charging pile is generally produced by injection molding. However, due to the large size of the rear shell of the charging pile, the size of the required mold insert is also large, and a forming cavity needs to be machined on the whole mold insert. The middle two sides of the rear shell have a complex grid structure, and the corresponding middle groove wall of the mold insert needs to be machined with a forming cavity structure for forming the grid of the rear shell. The large size of the mold insert, combined with the complex forming structure of the groove wall, makes machining difficult, inconvenient for machining and polishing, and prone to poor machining precision, resulting in heavy defects in the formed product. SUMMARY

[0004] The purpose of the present application is to overcome the shortcomings of the prior art and provide a large-size mold insert assembly structure and an injection mold thereof, which realize the connection between the first mold insert and the second mold insert through a contract block.

[0005] To achieve the purpose, the technical scheme adopted by the present application is:

[0006] The injection mold comprises a large-size mold insert assembly structure, the large-size mold insert assembly structure comprises a first mold insert, a second mold insert and a plurality of contract blocks, the contract blocks are provided with positioning grooves on two opposite sides, the two groove walls of the positioning grooves are inclined, the positioning grooves are approximately V-shaped, the first mold insert and the second mold insert are provided with a plurality of positioning grooves on the opposite sides, the two side walls of the positioning grooves are oppositely inclined, when the first mold insert and the second mold insert are oppositely combined, the positioning grooves on the first mold insert and the second mold insert are combined into a contract block groove, the contract block is inserted into the contract block groove and fixed with the first mold insert and the second mold insert, and the side surface of the contract block is in close contact with the groove wall of the contract block groove.

[0007] As a further optimization of the above technical solutions: the bottom of the other two opposite sides of the plot is provided with a fixed protrusion, the fixed protrusion is provided with a plurality of fixed holes, each of the fixed holes is provided with a screw, the bottom of the first mold insert and the second mold insert is provided with a plurality of fixed grooves, the fixed grooves are located on the side of the positioning groove, after the plot is inserted into the plot slot, the fixed protrusion is clamped into the fixed groove, the rod of the screw passes through the fixed hole and is fixed on the first mold insert or the second mold insert.

[0008] As a further optimization of the above technical solutions: the top of the plot is also provided with a top block protruding upward, the top block and the top surface of the plot form a positioning step, the side surface of the top block is inclined, after the plot is inserted into the plot slot, the top block is exposed from the plot slot.

[0009] As a further optimization of the above technical solutions: the first mold insert and the second mold insert are located on the movable mold side, the fixed mold side includes a fixed mold insert, the fixed mold insert, the first mold insert and the second mold insert jointly form part of the mold cavity, the fixed mold insert is provided with a groove corresponding to the top block, when the movable mold and the fixed mold are closed, the top block is inserted into the groove on the fixed mold insert.

[0010] As a further optimization of the above technical solutions: it also includes a slider, the slider is located on the side of the first mold insert and the second mold insert, the side surface of the slider forms the end surface of the product, the side surface of the slider is connected with a plurality of guide blocks, the guide blocks are provided with inclined guide holes, the inclined guide holes are provided with inclined guide columns, the top of the inclined guide columns is fixed on the fixed mold.

[0011] As a further optimization of the above technical solutions: the bottom of the slider is fixed with a limiting column, the lower side of the slider is provided with a limiting block, the limiting block is fixed on the movable mold, the limiting block is provided with a limiting hole and an insertion channel communicating with the limiting hole, the width of the insertion channel is smaller than the diameter of the limiting column, during the backward movement of the slider, the limiting column gradually presses the inner wall of the insertion channel, the limiting blocks on both sides of the insertion channel move away from each other, the limiting column passes through the insertion channel and enters the limiting hole, when the limiting column contacts with the hole wall of the limiting hole, the backward movement of the slider stops.

[0012] As a further optimization of the above technical solutions: a plurality of spring holes are also provided through the slider, a spring is arranged in each of the spring holes, the spring is also provided with a mounting groove communicating with the spring hole, a pressing block is mounted in the mounting groove, one end of the spring is connected with the pressing block, the other end of the spring is connected with the first mold insert or the second mold insert, in the closed state, the spring is in the compressed state.

[0013] As a further optimization of the above technical solutions: the fixed mold side comprises several hot runners, which inject glue on the non-appearance surface of the product.

[0014] Compared with the prior art, the moving mold insert is divided into a first mold insert and a second mold insert, the connection between the first mold insert and the second mold insert is realized through a key block, the size of the mold insert is reduced, machining and polishing are facilitated, machining time and cost are saved, machining precision is ensured, and the forming of the charging pile rear shell is ensured; the positioning grooves of the two side walls of the key block are inclined to form a butterfly-shaped key block, the alignment and fixation between the first mold insert and the second mold insert are positioned, the positioning precision is ensured, the fixation precision between the first mold insert and the second mold insert forms a complete moving mold insert, and the precise forming of the product is ensured; the fixing protrusions are clamped into the fixing grooves, the first mold insert and the second mold insert are fixed through the key block, the integrity of the forming surfaces on the first mold insert and the second mold insert is ensured, and the fixation is firm; when the moving mold and the fixed mold are closed, the top block is inserted into the groove in the fixed mold insert, the installation cooperation between the first mold insert, the second mold insert and the fixed mold insert is positioned, the integrity and precision of the mold cavity are ensured; the cooperation between the limiting column and the limiting block limits the core-pulling backward movement of the sliding block, prevents the sliding block from moving backward excessively and falling and hitting other structures, the tension of the spring also prevents the sliding block from moving backward excessively, the limiting of the sliding block by the spring and the limiting block plays a double insurance role, and prevents the excessive backward movement and falling of the sliding block caused by the failure of a single limiting structure from hitting other structures; the hot runners inject glue on the non-appearance surface of the product. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the three-dimensional structure of the present application.

[0016] Figure 2 is a schematic diagram of the three-dimensional structure of the present application from another angle.

[0017] Figure 3 is Figure 2 is an enlarged structure schematic diagram of position A in

[0018] Figure 4 is a schematic diagram of the three-dimensional structure of the key block in the present application.

[0019] Figure 5 is a schematic diagram of the cross-sectional structure of part of the structure in the present application. DETAILED DESCRIPTION

[0020] The present application will be further described below in conjunction with the drawings and specific embodiments. As shown in the drawings: Figures 1-5As shown, the injection mold comprises a large-size mold insert assembly structure, the large-size mold insert assembly structure comprises a first mold insert 1, a second mold insert 2 and a plurality of blocks 3. The two opposite sides of the block 3 are provided with positioning grooves 31, and the two groove walls of the positioning groove 31 are inclined to form a V-shaped groove. The opposite sides of the first mold insert 1 and the second mold insert 2 are provided with a plurality of positioning grooves 4, and the two side walls of the positioning groove 4 are oppositely inclined. When the first mold insert 1 and the second mold insert 2 are combined, the positioning grooves 4 on the first mold insert 1 and the second mold insert 2 are combined into a block groove, the block 3 is inserted into the block groove and fixed with the first mold insert 1 and the second mold insert 2, and the side surface of the block 3 is tightly attached to the groove wall of the block groove.

[0021] In the above technical solution: the bottom of the other two opposite sides of the block 3 is provided with a fixed protrusion 32, the fixed protrusion 32 is provided with a plurality of fixed holes 33, and each fixed hole 33 is provided with a screw 12. The bottom of the first mold insert 1 and the second mold insert 2 is provided with a plurality of fixed grooves 5, and the fixed grooves 5 are located on the side of the positioning groove 4. After the block 3 is inserted into the block groove, the fixed protrusion 32 is clamped into the fixed groove 5, and the rod of the screw 12 passes through the fixed hole 33 and is fixed on the first mold insert 1 or the second mold insert 2. The whole movable mold insert is divided into a first mold insert 1 and a second mold insert 2, and the connection between the first mold insert 1 and the second mold insert 2 is realized by the block 3, which reduces the size of the mold insert, facilitates machining and polishing, saves machining time and cost, and ensures machining precision. The two side walls of the block 3 are inclined to form a butterfly-shaped block 3, which can position the alignment and fixation between the first mold insert 1 and the second mold insert 2, ensure the positioning accuracy, and ensure the accuracy of the first mold insert 1 and the second mold insert 2 to form a complete movable mold insert, which ensures the accurate molding of the product. The fixed protrusion 32 is clamped into the fixed groove 5, the first mold insert 1 and the second mold insert 2 are fixed by the block 3, which ensures the integrity of the molding surface of the first mold insert 1 and the second mold insert 2, and ensures firm fixation.

[0022] In the above technical solution: the top of the block 3 is further provided with a top block 34 protruding upward, and the top block 34 and the top surface of the block 3 form a positioning step. The side surface of the top block 34 is inclined, and the longitudinal section of the top block 34 is isosceles trapezoidal. After the block 3 is inserted into the block groove, the top block 34 is exposed from the block groove. The first mold insert 1 and the second mold insert 2 are located on the movable mold side, and the fixed mold side comprises a fixed mold insert, the fixed mold insert is provided with a groove corresponding to the top block 34. When the movable mold and the fixed mold are combined, the top block 34 is inserted into the groove on the fixed mold insert, which can position the installation and cooperation between the first mold insert 1, the second mold insert 2 and the fixed mold insert, and ensure the integrity and accuracy of the mold cavity.

[0023] In the above technical solution: further comprising a sliding block 6, the sliding block 6 is located on the side of the first mold insert 1 and the second mold insert 2, the side of the sliding block 6 forms the end face of the product 13, and the product 13 in the embodiment is a charging pile rear shell. The side of the sliding block 6 is connected with a plurality of guide blocks 9, the guide blocks 9 are provided with inclined guide holes 91, inclined guide columns 14 are arranged in the guide holes 91, and the top of the inclined guide columns 14 is fixed on the fixed mold. When the mold is opened, the sliding block 6 is driven downward by the movable mold, and the sliding block 6 is backwardly moved and core-pulled downward under the guidance of the inclined guide columns 14 and the inclined guide holes 91, so that the sliding block 6 is separated from the formed product 13; after the core-pulling of the sliding block 6 is completed, the product 13 is upwardly ejected by the ejector plate on the movable mold, so that the product 13 is separated from the first mold insert 1 and the second mold insert 2, and the product ejection is completed.

[0024] In the above technical solution: the bottom of the sliding block 6 is fixed with a limiting column 7, the lower side of the sliding block 6 is provided with a limiting block 8, the limiting block 8 is fixed on the movable mold, the limiting block 8 is provided with a limiting hole 81 and an insertion channel 82 in communication with the limiting hole 81, and the width of the insertion channel 82 is smaller than the diameter of the limiting column 7. During the backward movement of the sliding block 6, the limiting column 7 gradually presses the inner wall of the insertion channel 82, the limiting blocks on the two sides of the insertion channel 82 move away from each other, the width of the insertion channel 82 becomes larger, the limiting column 7 passes through the insertion channel 82 and enters the limiting hole 81, and when the limiting column 7 contacts the hole wall of the limiting hole 81, the backward movement of the sliding block 6 is stopped. The cooperation between the limiting column 7 and the limiting block 8 limits the backward movement of the sliding block 6, so that the backward movement of the sliding block 6 is prevented from being excessive and falling and hitting other structures.

[0025] In the above technical solution: a plurality of spring holes 61 are further arranged in the sliding block 6, a spring 10 is arranged in each spring hole 61, the spring 10 is further provided with an installation groove 62 in communication with the spring hole 61, a pressing block 11 is arranged in the installation groove 62, one end of the spring 10 is connected with the pressing block 11, and the other end of the spring 10 is connected with the first mold insert 1 or the second mold insert 2. In the closed mold state, the spring 10 is in a compressed state; after the mold is opened, the sliding block 6 is backwardly moved, the spring force of the spring 10 is released, the backward movement of the sliding block 6 is assisted, and the product is prevented from sticking to the sliding block 6. After the spring force of the spring 10 is completely released, the pulling force of the spring 10 prevents the backward movement of the sliding block 6 from being excessive, the limiting of the sliding block 6 by the spring 10 and the limiting block 8 has a double insurance effect, and the backward movement of the sliding block 6 is prevented from being excessive and falling and hitting other structures due to the failure of a single limiting structure.

[0026] In the above technical solution: the fixed mold side comprises a plurality of hot runners 15, the product 13 has large size and many curved arc surfaces, the hot runner 15 point position is not easy to arrange, and therefore the hot runner 15 point position is determined on the non-appearance surface of the product 13 first, then the hot nozzle shape is directly changed to achieve the rationality of the hot runner 15 point position, and the hot runner 15 is ensured to inject on the non-appearance surface of the product 13.

[0027] The preferred embodiments of the application have been described in detail herewith. It should be understood that modifications and variations can be resorted to without departing from the spirit of this application, as those skilled in the art will readily understand. Accordingly, the scope of the application should be limited only by the appended claims.

Claims

1. An injection mold, characterized in that... The assembly structure includes a large-size mold insert, which includes a first mold insert (1), a second mold insert (2), and several wedges (3). The wedges (3) have positioning grooves (31) on two opposite sides. The two walls of the positioning grooves (31) are inclined, making the positioning grooves (31) approximately V-shaped. The first mold insert (1) and the second mold insert (2) have several positioning slots (4) on opposite sides. The two walls of the positioning slots (4) are inclined relative to each other. When the first mold insert (1) and the second mold insert (2) are assembled, the positioning slots (4) on the first mold insert (1) and the positioning slots (4) on the second mold insert (2) are assembled into a wedge slot. The wedges (3) are inserted into the wedge slot and fixed to the first mold insert (1) and the second mold insert (2). The side of the wedges (3) is in close contact with the wall of the wedge slot. The top of the wedge (3) is also provided with an upwardly protruding top block (34), and a positioning step is formed between the top block (34) and the top surface of the wedge (3). The sides of the top block (34) are all inclined. After the wedge (3) is inserted into the wedge groove, the top block (34) protrudes from the wedge groove. The first mold insert (1) and the second mold insert (2) are located on the moving mold side, and the fixed mold side includes a fixed mold insert. The fixed mold insert, the first mold insert (1), and the second mold insert (2) together form a part of the mold cavity. The fixed mold insert has a groove corresponding to the top block (34). When the moving and fixed molds are closed, the top block (34) is inserted into the groove on the fixed mold insert.

2. The injection mold according to claim 1, characterized in that... The bottom of the other two opposite sides of the wedge (3) is provided with fixing protrusions (32), and the fixing protrusions (32) are provided with a plurality of fixing holes (33). Each fixing hole (33) is provided with a screw (12). The bottom of the first mold insert (1) and the second mold insert (2) are provided with a plurality of fixing grooves (5). The fixing grooves (5) are located on the side of the positioning groove (4). After the wedge (3) is inserted into the wedge groove, the fixing protrusions (32) are inserted into the fixing grooves (5). The shank of the screw (12) passes through the fixing holes (33) and is fixed on the first mold insert (1) or the second mold insert (2).

3. The injection mold according to claim 1, characterized in that... It also includes a slider (6), which is located on the side of the first mold insert (1) and the second mold insert (2). The side of the slider (6) shapes the end face of the product (13). The side of the slider (6) is connected to several guide blocks (9). The guide blocks (9) are provided with inclined guide holes (91). An inclined guide post (14) is inserted into the guide hole (91). The top of the inclined guide post (14) is fixed on the fixed mold.

4. The injection mold according to claim 3, characterized in that... The bottom of the slider (6) is fixed with a limiting post (7), and a limiting block (8) is provided below the slider (6). The limiting block (8) is fixed on the moving mold. The limiting block (8) has a limiting hole (81) and an insertion channel (82) communicating with the limiting hole (81). The width of the insertion channel (82) is smaller than the diameter of the limiting post (7). During the backward movement of the slider (6), the limiting post (7) gradually squeezes the inner wall of the insertion channel (82). The limiting blocks on both sides of the insertion channel (82) move in opposite directions. The limiting post (7) passes through the insertion channel (82) and enters the limiting hole (81). When the limiting post (7) contacts the hole wall of the limiting hole (81), the slider (6) stops moving backward.

5. The injection mold according to claim 3, characterized in that... The slider (6) is also provided with a number of spring holes (61), and each spring hole (61) is provided with a spring (10). The spring (10) is also provided with a mounting groove (62) communicating with the spring hole (61). A pressure block (11) is installed in the mounting groove (62). One end of the spring (10) is connected to the pressure block (11), and the other end of the spring (10) is connected to the first mold insert (1) or the second mold insert (2). When the mold is closed, the spring (10) is in a compressed state.

6. The injection mold according to claim 1, characterized in that... The fixed mold side includes several hot runners (15), which inject glue on the non-appearance surface of the product (13).

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