Multi-gram weight difference large and small cover runner balance multi-cavity thin-wall mold

Abstract

The utility model provides a multi-time gram weight difference big and small cover runner balance multi-cavity thin-wall die which comprises an upper die and a lower die which can realize die assembly, a plurality of forming cavities with different feeding gram weights are arranged between the upper die and the lower die, a heating seat is arranged in the upper die, a plurality of hot nozzles communicated with the forming cavities are arranged on the heating seat, a main heating runner is arranged in the heating seat, and a plurality of hot nozzles communicated with the main heating runner are arranged in the main heating runner. The main heating runner is communicated with each hot nozzle through a branch runner; the side wall of the branch runner is provided with a screw hole, an adjusting bolt is arranged in the screw hole, the head of the adjusting bolt can extend into the branch runner and can adjust the sectional area of the branch runner, the end part of the adjusting bolt is provided with an operating part, and the side wall of the upper die is provided with an operating hole which is coaxial with the adjusting bolt and can allow an adjusting tool to pass through so as to adjust the adjusting bolt. According to the multi-cavity thin-wall die for balancing the flow channels of the large and small covers with the multiplied gram weight fall, the balance of the flow channels can be adjusted, the balance of materials in the forming cavities with different feeding gram weights is ensured, the product quality is improved, and the use effect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of moulds, in particular to a kind of multi-fold weight difference size cover runner balanced multi-cavity thin-wall mould. BACKGROUND

[0002] Plastic mould is a kind of tool for producing plastic products, it is composed of several parts, and there is a molding cavity in the combination. When injection molding, the mold is clamped on the injection molding machine, and the molten plastic is injected into the molding cavity, and is cooled and shaped in the cavity, then the upper and lower molds are separated, the product is ejected from the mold cavity by the ejection system, and finally the mold is closed for the next injection molding, the whole injection molding process is recycled.

[0003] In order to improve the injection efficiency, for small volume, especially small volume of thin-walled products, multiple cavities are usually used for simultaneous injection molding, when the products in multiple molding cavities have weight difference, that is, the cavities have large and small, the volume (weight) of the material entering the large cavity is different from the volume (weight) of the material entering the small cavity, and the use of ordinary injection molding process will cause the runner imbalance of large and small cavities, which is easy to cause insufficient filling of large cavity or excessive pressure of small cavity, affecting the product quality. CONTENT OF THE UTILITY MODEL

[0004] Technical problem to be solved

[0005] The technical problem to be solved by the utility model is to provide a multi-fold weight difference size cover runner balanced multi-cavity thin-wall mould which can adjust the flow of runner and realize runner balance, and is convenient and labor-saving to adjust.

[0006] Technical scheme for solving the problem

[0007] The utility model provides a kind of multi-fold weight difference size cover runner balanced multi-cavity thin-wall mould, including the upper die and lower die that can realize clamping, a plurality of feeding weight different molding cavities are equipped between the upper die and the lower die, heating seat 2 is equipped in the upper die, a plurality of hot nozzles are equipped in heating seat 2 and communicated with the molding cavity, main heating runner 2a is equipped in heating seat 2, main heating runner 2a is communicated with each hot nozzle by branch runner and is used for feeding;Screw hole is equipped in the side wall of branch runner, adjusting bolt 6 is equipped in screw hole, the head of adjusting bolt 6 can extend into branch runner and adjust the cross-sectional area of branch runner, operating portion is equipped in the end of adjusting bolt 6, operating hole is opened in the side wall of upper die and is coaxial with adjusting bolt 6 and can be passed through with adjusting tool to adjust adjusting bolt 6.

[0008] Further, adjusting bolt 6 is vertically arranged, and the operating portion is located at the lower end, and the operating hole is opened in the bottom surface of the lower die.

[0009] Further, the adjusting bolt 6 is arranged on the branch runner of the small-weight forming cavity.

[0010] Further, the feed weight of each forming cavity is greater than or equal to 3 and less than or equal to 10.

[0011] Further, the operating part of the adjusting bolt 6 is a regular polygon hole.

[0012] Further, the screw hole is provided with an elastic component 7 for making the adjusting bolt 6 have an outward movement tendency.

[0013] Further, the adjusting amount of the adjusting bolt 6 to the sectional area of the branch runner is greater than or equal to 0 and less than or equal to 90%.

[0014] Further, the upper die comprises an upper bottom plate 1, an upper die seat 3 and an upper die plate 4 arranged in sequence from top to bottom, the bottom of the upper die plate 4 is provided with a plurality of upper die cores 5, the heating seat 2 is arranged in the upper die seat 3, the operating hole is arranged on the bottom surface of the upper die core, and penetrates the upper die core 5, the upper die plate 4 and the upper die seat 3 in sequence from top to bottom.

[0015] Further, the lower end of the adjusting bolt 6 is detachably provided with a supporting block 8, the top of the supporting block 8 can be in contact with the lower end of the adjusting bolt 6 and realize axial limiting, and the supporting block 8 is provided with a hole body 80 coaxial with the operating hole and capable of allowing the adjusting tool to pass through.

[0016] Further, the screw hole is arranged on the bottom surface of the heating seat 2, and comprises a first hole body 201, a second hole body 202 and a third hole body 203 arranged in sequence from bottom to top and having diameters decreasing in sequence, the third hole body 203 communicates with the branch runner 2a, and the inner wall of the first hole body 201 or the second hole body 202 is provided with an internal thread.

[0017] Further, the adjusting bolt 6 comprises a first shaft body 61, a second shaft body 62 and a third shaft body 63 arranged in sequence from bottom to top and having diameters decreasing in sequence, the end of the first shaft body 61 is provided with an internal hexagonal hole 610 and serves as an operating part, the side wall of the first shaft body 61 or the second shaft body 62 is provided with an external thread, and the third shaft body 63 can pass through the third hole body and extend into the branch runner.

[0018] Advantages

[0019] The utility model discloses a multiple cavity thin wall mould of flow channel balance of multiple gram weight drop size cover, is provided with the adjusting bolt on the branch runner, can adjust the feed area of hot nozzle, realizes the flow channel balance, effectively solves the unbalance problem of the different feed gram weight of the forming cavity in the injection molding process of multiple cavity mould, realizes the independent adjustment of each hot nozzle in multiple cavity mould through the accurate control of adjusting bolt, ensures the consistency of the material pressure in each cavity, improves the overall precision and stability of product, simultaneously, the design simplifies the adjustment process, reduces the operation difficulty, improves production efficiency, brings substantial improvement for manufacturing industry, sets up compression spring, makes it have self -locking ability, improves the rotation stability when adjusting under the guarantee of adjusting bolt stability, avoids the jumping, improves the adjustment precision, uses reliable and stable, carries out the structural design to adjusting bolt, and the installation and adjustment are convenient, and the assembly precision is high, and the adjustment effect is good, adjusting bolt is vertically set up, and the overall design layout is reasonable, does not interfere with each other, and the structure compactness is high, and the adjustment is convenient, quick, and can avoid the influence of foreign matter and affect the adjustment, sets up the support block structure, can carry out the axial location to adjusting bolt, avoids the thread loosening caused by the overstroke of adjusting, ensures the stability and safety of mould in the continuous production process, the utility model discloses a multiple cavity thin wall mould of flow channel balance of multiple gram weight drop size cover, can adjust the balance of flow channel, ensures the material balance in the forming cavity of different feed gram weight, improves product quality, and the use effect is good. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 It is the structural schematic diagram of the utility model discloses a multiple cavity thin wall mould of flow channel balance of multiple gram weight drop size cover;

[0021] Figure 2 It is the sectional view of the utility model discloses a multiple cavity thin wall mould of flow channel balance of multiple gram weight drop size cover;

[0022] Figure 3 It is Figure 2 It is the enlarged view of A part in middle;

[0023] Figure 4 It is Figure 3 It is the enlarged view of B part in middle;

[0024] Figure 5 It is the structural schematic diagram of screw hole of the utility model discloses a multiple cavity thin wall mould of flow channel balance of multiple gram weight drop size cover;

[0025] Figure 6 It is the structural schematic diagram of adjusting bolt of the utility model discloses a multiple cavity thin wall mould of flow channel balance of multiple gram weight drop size cover;

[0026] Figure 7 It is the installation schematic diagram of heating seat of the utility model discloses a multiple cavity thin wall mould of flow channel balance of multiple gram weight drop size cover;

[0027] Figure 8 The result schematic view of the upper die of the multi-cavity thin-wall mold with flow channel balance of different size lids with different gram weight drop of the utility model;

[0028] Figure 9 The utility model discloses a multi-cavity thin-wall mold with flow channel balance of different size lids with different gram weight drop Figure 8 The enlarged view of middle C part;

[0029] Figure 10 The structure schematic view of the supporting block of the multi-cavity thin-wall mold with flow channel balance of different size lids with different gram weight drop of the utility model;

[0030] Figure 11 The utility model discloses a multi-cavity thin-wall mold with flow channel balance of different size lids with different gram weight drop Figure 10 The enlarged view of middle D part. Specific implementation

[0031] The utility model discloses a multi-cavity thin-wall mold with flow channel balance of different size lids with different gram weight drop

[0032] Refer to Figures 1-11 The utility model provides a multi-cavity thin-wall mold with flow channel balance of different size lids with different gram weight drop for the multi-cavity simultaneous forming of multiple size lids, and the volume and gram weight of size lid are different, that is, the injection amount (material volume) is different, and the gram weight of big lid is 3-10 times of the gram weight of small lid, in the embodiment, the gram weight of big lid is 7 times of the gram weight of small lid, and it includes upper die and lower die, and the upper die and lower die are connected through multiple guide columns and can realize mutual approaching or moving away, realizes clamping and parting, and multiple forming cavities are arranged between the upper die and lower die, the forming cavity is multiple, is used for the forming of big lid and the forming of small lid respectively, that is, the feed gram weight (volume) of each forming cavity is different, therefore, the different molten material that needs to enter, is equipped with heating seat 2 in the upper die, is equipped with the same number of heat nozzles as the number of forming cavities and one-to-one correspondence on the heating seat 2, and the lower end injection end of heat nozzle is communicated with forming cavity and is used for injecting molten material, at the same time, the main heating flow channel 2a is arranged in the heating seat 2, the material injection port 11 is arranged at the top of heating seat 2, which extends to the outside of upper die and is used for being connected with injection molding machine, realizes feeding, and the material injection port 11 is communicated with the internal main heating flow channel 2a, at the same time, the electric heater is arranged on the side wall of heating seat 2 and is used for heating the material in heating seat 2, to ensure its fluidity, because it is a multi-cavity forming structure, therefore, the molten material needs to be delivered to each heat nozzle through the main flow channel, and then the simultaneous feeding of multiple forming cavities is completed, each heat nozzle is communicated with the main heating flow channel 2a through the branch flow channel and realizes feeding.

[0033] In the application, a screw hole is arranged on the side wall of the branch runner, an adjusting bolt 6 is arranged in the screw hole, the head of the adjusting bolt 6 can extend into the branch runner, thereby the cross-sectional area of the branch runner can be adjusted, that is, the communication area (feeding area) of the main heating runner and the hot nozzle is adjusted, the flow of the molten material is adjusted, an operating part is arranged at the end of the adjusting bolt 6, the operating part is a regular polygon recess, in this embodiment, it is a regular hexagonal hole, at the same time, an operating hole is arranged on the side wall of the upper die of the upper die, the operating hole is coaxial with the adjusting bolt 6, the adjusting tool can pass through the operating hole to adjust the adjusting bolt 6, the adjusting tool is a tool for twisting the adjusting bolt 6, in this application, it is a hexagonal wrench, when adjusting, the hexagonal wrench (adjusting tool) passes through the operating hole and is clamped into the hexagonal hole at the end of the adjusting bolt, and drives the adjusting bolt 6 to rotate, axial movement is realized, thereby the extension amount of the head of the adjusting bolt in the branch runner is adjusted, that is, the flow area of the branch runner is adjusted; in this application, the adjusting bolt 6 is arranged on the branch runner of the small-weight forming cavity, it can adjust the flow channel of the small-weight forming cavity, ensure the stability of the internal pressure, avoid excessive pressure, and the overall balance of the internal flow channel system; and the adjusting amount of the cross-sectional area of the branch runner by the adjusting bolt 6 is greater than or equal to 0 and less than or equal to 90%, that is, the cross-sectional area of 0%-90% of the branch runner can be blocked, the adjustment range is suitable for the use of forming cavities with different sizes and weight multiples, and the application range is wide.

[0034] In order to improve the rationality of the overall layout and facilitate processing and manufacturing and adjustment, in this application, the adjusting bolt 6 is arranged vertically, the operating part is located at the lower end, and the operating hole is arranged on the bottom surface of the lower die.

[0035] In order to improve the adjustment stability of the adjusting bolt 6 and make it have self-locking ability, improve the use reliability and stability, in this application, an elastic component 7 is arranged in the screw hole, the elastic component is a compression spring, it makes the adjusting bolt 6 have an outward movement trend, that is, the adjusting bolt 6 has a movement trend away from the branch runner, it can tighten the screw thread, form self-locking, avoid movement after adjustment, improve the adjustment accuracy and reliability, at the same time, improve the stability during adjustment, the adjustment accuracy is high.

[0036] In the application, the upper die comprises an upper bottom plate 1, an upper die seat 3 and an upper die plate 4 arranged in sequence from top to bottom, the bottom of the upper die plate 4 is provided with a plurality of upper die cores 5, the bottom surface of the upper die core is provided with an upper forming surface 5a, a plurality of lower die cores corresponding to the upper die cores are arranged on the lower die, a forming cavity is formed between the upper die core and the lower die core, an installation cavity is arranged on the top of the upper die seat, the upper bottom plate 1 is fixed on the top of the upper die seat, so that the installation cavity forms a sealed chamber, the heating seat 2 is installed in the sealed chamber, and the bottom surface, top surface and side wall of the heating seat 2 have gaps with the inner wall of the sealed chamber, so as to avoid heat transfer to the upper die during heating, an operation hole is arranged on the bottom surface of the upper die core and penetrates the upper die core 5, the upper die plate 4 and the upper die seat 3 in sequence, specifically, the operation hole comprises an operation hole I 50 penetrating the upper die core 5, an operation hole II 40 penetrating the upper die plate 4, and an operation hole III 30 arranged on the bottom surface of the installation cavity (the upper die seat 3), and the operation hole I 50, the operation hole II 40 and the operation hole III 30 are coaxially arranged and can accommodate an internal hexagonal wrench to rotate and adjust the adjusting bolt.

[0037] In the application, the screw hole is arranged on the bottom surface of the heating seat 2, which is vertically arranged, i.e. parallel to the direction of closing the mold, referring to Figure 5 The screw hole comprises a first hole body 201, a second hole body 202 and a third hole body 203 arranged in sequence from bottom to top and coaxially, and the diameters of the first hole body 201, the second hole body 202 and the third hole body 203 decrease in sequence, so that a downward step surface is formed between the first hole body 201 and the second hole body 202 and between the second hole body 202 and the third hole body 203, which is used for installing an elastic component (compression spring), wherein the third hole body 203 is communicated with the branch channel 2a, and the inner wall of the first hole body 201 or the second hole body 202 is provided with an internal thread, which is used for realizing threaded connection with the adjusting bolt 6; referring to Figure 6The adjusting bolt 6 comprises a first shaft body 61, a second shaft body 62 and a third shaft body 63 arranged in sequence from bottom to top and coaxially, and the diameters of the first shaft body 61, the second shaft body 62 and the third shaft body 63 are sequentially reduced. The first shaft body 61 is located in the first hole body 201. When the inner wall of the first hole body is provided with internal threads, the outer wall of the first shaft body 61 is provided with external threads matched with the internal threads, so as to realize threaded connection. The second shaft body is located in the second hole body. When the inner wall of the second hole body is provided with internal threads, the side wall of the second shaft body 62 is provided with external threads matched with the internal threads, so as to realize threaded connection. The diameter of the third shaft body 63 is the same as the hole diameter of the third hole body, and the third shaft body 63 is sleeved in the third hole body. The outer wall of the third shaft body 63 is in close contact with the inner wall of the third hole body, and the gap therebetween is very small, so that a certain machining precision is required. A stepped surface upward is formed between the first shaft body 601 and the second shaft body 62, and between the second shaft body and the third shaft body 63, for mounting an elastic component (compression spring). In the present application, the compression component is arranged between the lower stepped surface of the second shaft body and the third shaft body and the upper stepped surface between the second hole body and the third hole body, and the internal threads are arranged in the first hole body. The second shaft body and the second hole body are slidably connected, thereby improving the connection precision and the adjusting stability. An internal hexagonal hole 610 is formed in the end of the first shaft body 61, forming an operating part. The side wall of the first shaft body 61 or the second shaft body 62 is provided with external threads. The third shaft body 63 can pass through the third hole body and extend into the branch channel.

[0038] In order to control the adjusting stroke of the adjusting bolt, especially the outer limit stroke, and avoid falling off caused by excessive adjustment, a support block 8 is detachably installed at the lower end of the adjusting bolt 6 in the present application. The support block 8 is installed at the bottom of the installation cavity by a bolt in the present application. The support block 8 is arranged close to the hot nozzle mounting hole 30 and has a "8" shaped structure. One end is fixed to the bottom surface of the installation cavity by a screw, and the other end is provided with a hole body 80 coaxial with the operating hole. The top of the support block 8 can contact the lower end of the adjusting bolt 6, thereby realizing axial limiting of the adjusting bolt and controlling the lower limit position to avoid excessive adjustment stroke.

[0039] The utility model discloses a multiple cavity thin wall mould of flow channel balance of multiple gram weight drop size cover, is provided with the adjusting bolt on the branch runner, can adjust the feed area of hot nozzle, realizes the flow channel balance, effectively solves the unbalance problem of the different feed gram weight of the forming cavity in the injection molding process of multiple cavity mould, realizes the independent adjustment of each hot nozzle in multiple cavity mould through the accurate control of adjusting bolt, ensures the consistency of the material pressure in each cavity, improves the overall precision and stability of product, simultaneously, the design simplifies the adjustment process, reduces the operation difficulty, improves production efficiency, brings substantial improvement for manufacturing industry, sets up compression spring, makes it have self -locking ability, improves the rotation stability when adjusting, avoids the jumping, improves the adjustment precision, uses reliable and stable, carries out the structural design to adjusting bolt, and the installation and adjustment are convenient, and the assembly precision is high, and the adjustment effect is good, adjusting bolt is vertically arranged, and the overall design layout is reasonable, and does not interfere with each other, and the compactness of structure is high, and the adjustment is convenient, fast, and can avoid the influence of foreign matter and affect the adjustment, sets up the support block structure, can carry out the axial location to adjusting bolt, avoids the thread loosening caused by the overstroke of adjustment, ensures the stability and safety of mould in continuous production process, the utility model discloses a multiple cavity thin wall mould of flow channel balance of multiple gram weight drop size cover, can adjust the balance of flow channel, ensures the material balance in the forming cavity of different feed gram weight, improves product quality, and the use effect is good.

[0040] The above only is the preferred implementation of the utility model, should point out, for the ordinary skill in the art of the present technology, on the premise of not departing from the technical principle of the utility model, can make a number of improvements and refinements, these improvements and refinements also should be regarded as the protection scope of the utility model.

Claims

1. A multi-cavity thin-wall mold with balanced flow channels for a multi-lobed drop-difference size cap, characterized by: The mould includes an upper mould and a lower mould, a plurality of feeding cavities with different grammage are arranged between the upper mould and the lower mould, a heating seat is arranged in the upper mould, a plurality of heating nozzles are arranged on the heating seat and communicated with the feeding cavities, a main heating flow channel is arranged in the heating seat, the main heating flow channel is communicated with each heating nozzle through a branch flow channel and used for feeding; a screw hole is arranged on the side wall of the branch flow channel, an adjusting bolt is arranged in the screw hole, the head of the adjusting bolt can extend into the branch flow channel and adjust the cross-sectional area of the branch flow channel, the end of the adjusting bolt is provided with an operating part, and an operating hole coaxial with the adjusting bolt and capable of allowing an adjusting tool to pass through to adjust the adjusting bolt is arranged on the side wall of the upper mould.

2. The multi-cavity thin wall mold of claim 1, wherein: The adjusting bolt is arranged on the branch flow channel of the small-grammage feeding cavity.

3. The multi-cavity thin wall mold of claim 1, wherein: The adjusting bolt is arranged vertically and the operating part is located at the lower end, and the operating hole is arranged on the bottom surface of the lower mould.

4. The multi-cavity thin wall mold of claim 1, wherein: the multi-cavity thin wall mold is a multi-cavity thin wall mold of a size cover with a multi-fold drop difference, and the multi-cavity thin wall mold is a multi-cavity thin wall mold of a size cover with a multi-fold drop difference. The operating part is a regular polygon hole.

5. The multi-cavity thin-wall mold with multiple weight difference and flow channel balance according to claim 1, characterized in that: An elastic component is arranged in the screw hole to make the adjusting bolt have an outward movement trend.

6. The multi-cavity thin wall mold of claim 1, wherein: The adjusting amount of the adjusting bolt to the cross-sectional area of the branch flow channel is greater than or equal to 0 and less than or equal to 90%.

7. The multi-cavity thin wall mold of claim 1, wherein: The upper mould includes an upper bottom plate, an upper mould seat and an upper mould plate arranged in sequence from top to bottom, a plurality of upper mould cores are arranged on the bottom of the upper mould plate, the heating seat is arranged in the upper mould seat, the operating hole is arranged on the bottom surface of the upper mould core and penetrates the upper mould core, the upper mould plate and the upper mould seat in sequence upwards.

8. The multi-cavity thin wall mold of claim 7, wherein: A supporting block is detachably arranged at the lower end of the adjusting bolt, the top of the supporting block can be in contact with the lower end of the adjusting bolt and realize axial limiting, and a hole body coaxial with the operating hole and capable of allowing an adjusting tool to pass through is arranged on the supporting block.

9. The multi-cavity thin wall mold of claim 1 wherein: the multi-cavity thin wall mold is a multi-cavity thin wall mold of a size cover with a multi- fold drop differential. The screw hole is arranged on the bottom surface of the heating seat and includes a first hole body, a second hole body and a third hole body arranged in sequence from bottom to top and with diameters decreasing in sequence, the third hole body is communicated with the branch flow channel, and the inner wall of the first hole body or the second hole body is provided with an internal thread.

10. The multi-cavity thin wall mold of claim 9, wherein: The adjusting bolt includes a first shaft body, a second shaft body and a third shaft body arranged in sequence from bottom to top and with diameters decreasing in sequence, an internal hexagonal hole is arranged on the end of the first shaft body and used as an operating part, the side wall of the first shaft body or the second shaft body is provided with an external thread, and the third shaft body can pass through the third hole body and extend into the branch flow channel.

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