Rocket head mold

Abstract

The utility model relates to the field of injection molding production, and discloses a rocket head mold which comprises an upper mold assembly and a lower mold assembly, the upper mold assembly comprises an upper sealing plate and a hot runner plate, an upper mold insert is mounted on one side of the hot runner plate, and a plurality of upper mold inserts are mounted on one side of the upper mold insert; the lower die assembly comprises a push plate and an ejector plate, a lower die insert is arranged on one side of the push plate, and a plurality of lower die inserts are mounted on one side of the lower die insert; a forming cavity is formed between the lower mold insert and the upper mold insert; an injection molding hole is formed in the upper mold insert; an injection molding hot nozzle is fixed on the upper sealing plate, and the other end of the injection molding hot nozzle is arranged in the injection molding hole; a sub-runner is arranged on one side of the lower mold insert and is respectively communicated with the injection molding hole and the lower mold insert; according to the utility model, the hot runner plate can control the temperature of an injection molding raw material melt, and the injection molding raw material can flow in the sub-runners more uniformly, so that parts with better quality and more consistency are obtained, and as the glue feeding balance is better, the injection molding hot nozzle can control more molding cavities, and the injection molding capacity is improved.

Description

Technical Field

[0001] The utility model relates to the field of injection molding production, in particular to a rocket head mold. Background Art

[0002] During the infusion treatment of patients, an infusion tube is required. One end of the infusion tube is inserted into the patient's body as an infusion needle, and the other end is connected to an infusion bottle as an insertion bottle needle. The insertion bottle needle is generally made of plastic and is produced by an injection molding process to save costs. Because its shape resembles a rocket, it is also called a rocket head.

[0003] In the existing rocket head production solutions, on the one hand, the existing molds mostly adopt a cold runner structure, and it is difficult to achieve balanced glue injection, resulting in poor consistency of product dimensions; on the other hand, limited by the unbalanced glue injection pressure, the number of cavities of the existing rocket head molds is too small to meet the growing production capacity requirements. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is: how to improve the consistency of product dimensions and the production capacity of products. To solve the above technical problems, the utility model provides a rocket head mold, which includes an upper mold assembly and a lower mold assembly;

[0005] The upper mold assembly includes a fixed upper sealing plate and a hot runner plate. A plurality of first cavities are provided on the side of the hot runner plate away from the upper sealing plate. Upper mold inserts are installed in the first cavities, and a plurality of upper mold inserts are installed on the side of the upper mold inserts away from the hot runner plate;

[0006] The lower mold assembly includes a fixed push plate and a ejector pin plate. A second cavity corresponding to the first cavity is provided on the side of the push plate away from the ejector pin plate. Lower mold inserts corresponding to the upper mold inserts are provided in the second cavity. A plurality of lower mold inserts are installed on the side of the lower mold inserts facing the upper mold inserts; a molding cavity is formed between the lower mold inserts and the upper mold inserts

[0007] The upper sealing plate is provided with a first fixing hole. The hot runner plate is provided with a first through hole corresponding to the first fixing hole. The upper mold insert is provided with an injection hole corresponding to the first through hole; an injection nozzle is fixed in the first fixing hole, and the other end of the injection nozzle passes through the first through hole and is arranged in the injection hole; a runner is provided on the side of the lower mold insert facing the upper mold insert, and the runner is respectively communicated with the injection hole and the lower mold insert;

[0008] Four of the first cavities, upper mold inserts, second cavities and lower mold inserts are arranged in an array.

[0009] Preferably, twenty upper die inserts and twenty lower die inserts are respectively installed on the upper die insert block and the lower die insert block; a single runner communicates with and controls twenty of the forming cavities.

[0010] Preferably, the ejector plate is provided with a plurality of second through holes, and the ejector pin plate is fixedly connected with a plurality of first ejector pins corresponding to the second through holes. One end of each first ejector pin is connected to the ejector pin plate, and the other end passes through the second through hole and is arranged in the first ejector pin hole of the lower die insert.

[0011] Preferably, an upper die insert pin is fixed on the upper die insert block, and the other end of the upper die insert pin is arranged in the insert pin hole of the upper die insert.

[0012] Preferably, the ejector plate is provided with a third through hole in the middle of the second cavity, and the ejector pin plate is fixed with a plurality of second ejector pins corresponding to the third through hole. The other end of each second ejector pin passes through the third through hole and the lower die insert block and is arranged in the second ejector pin hole of the runner.

[0013] Preferably, there are one hundred and sixty first ejector pin holes and insert pin holes, and twenty second ejector pin holes.

[0014] Preferably, the lower die assembly further includes a first baffle, a second baffle, a third baffle, a lower panel and a square iron die foot; both ends of the square iron die foot are respectively connected to the ejector plate and the lower panel; one side of the first baffle is connected to the ejector pin plate, and the other side is connected to the second baffle; both sides of the third baffle are respectively connected to the second baffle and the lower panel; a guide rod is fixed on the third baffle, and the ejector pin plate, the first baffle and the second baffle are all sleeved on the guide rod, and the first baffle is connected with a driving device.

[0015] Preferably, the upper die assembly further includes an upper panel, and the upper panel is provided with a locating ring for positioning and connecting the raw material input pipeline.

[0016] In the embodiment of the present utility model, a rocket head mold provided compared with the prior art has the beneficial effects that:

[0017] In the present utility model, first, the cold runner is changed to a semi-hot runner, a hot runner plate is provided, and then a plurality of upper die inserts are installed on the hot runner plate. A plurality of upper die inserts are fixed on the upper die inserts. At the same time, a plurality of lower die inserts are installed on the ejector plate corresponding to the upper die inserts, and a plurality of lower die inserts are installed on the lower die inserts. During injection molding, the injection molding raw material will flow on the upper sealing plate and enter the injection molding nozzle fixed on the upper sealing plate. Then, the injection molding raw material enters the injection hole through the injection molding nozzle and enters the runner through the injection hole. The molding raw material flows in the runner and finally enters each molding cavity through each lower die insert to form a rocket head product; by changing the cold runner to a hot runner, the hot runner plate can accurately control the temperature of the injection molding raw material melt, and the injection molding raw material can flow in the runner in a more uniform state and finally flow into the molding cavity to be molded, so as to obtain parts with better quality and more consistent dimensions. In addition, the gate quality of the hot runner forming part is good, the residual stress after demolding is low, and the deformation is small. In addition, due to better injection balance and more uniform flow of the injection molding raw material, a single injection molding nozzle can control more molding cavities, thereby improving the injection molding production capacity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a side view of the present utility model;

[0019] Figure 2 is a top view of the upper panel of the present utility model;

[0020] Figure 3 is a top view of the upper sealing plate of the present utility model;

[0021] Figure 4 is a side view of the upper sealing plate of the present utility model;

[0022] Figure 5 is a top view of the hot runner plate of the present utility model;

[0023] Figure 6 is a side view of the hot runner plate of the present utility model;

[0024] Figure 7 is a top view of the ejector plate of the present utility model;

[0025] Figure 8 is a side view of the ejector plate of the present utility model;

[0026] Figure 9 is a top view of the upper die insert of the present utility model;

[0027] Figure 10 is a side view of the upper die insert of the present utility model;

[0028] Figure 11 is a top view of the lower die insert of the present utility model;

[0029] Figure 12 It is a side view of the lower die insert of the present utility model;

[0030] Figure 13 It is a sectional view of the upper die insert of the present utility model;

[0031] Figure 14 It is a top view of the upper die insert of the present utility model;

[0032] Figure 15 It is a sectional view of the lower die insert of the present utility model;

[0033] Figure 16 It is a top view of the lower die insert of the present utility model.

[0034] In the figure: 1. Upper die assembly; 11. Upper sealing plate; 111. First fixing hole; 12. Hot runner plate; 121. First cavity; 122. First through hole; 13. Lower die insert; 131. Injection hole; 14. Upper die insert; 141. Insert pin hole; 15. Upper panel; 151. Locating ring; 152. Nozzle;

[0035] 2. Lower die assembly; 21. Stripper plate; 211. Second cavity; 212. Second through hole; 213. Third through hole; 22. Ejector plate; 221. First ejector pin; 23. Lower die insert; 231. Runner; 24. Lower die insert; 241. First ejector pin hole; 25. First baffle; 26. Second baffle; 27. Third baffle; 28. Lower panel; 29. Square iron die feet

[0036] 3. Forming cavity; 4. Injection hot nozzle. Specific embodiments

[0037] The following combines the drawings and embodiments to further describe in detail the specific embodiments of the present utility model. The following embodiments are used to illustrate the present utility model, but not to limit the scope of the present utility model.

[0038] As Figures 1 to 12 shown, a preferred embodiment of the present utility model provides a rocket head mold, which includes an upper die assembly 1 and a lower die assembly 2; the upper die assembly 1 includes an upper sealing plate 11 and a hot runner plate 12 fixedly connected, and a plurality of first cavities 121 are provided on the side of the hot runner plate 12 away from the upper sealing plate 11. An upper die insert 13 is installed in the first cavity 121, and a plurality of upper die inserts 14 are installed on the side of the upper die insert 13 away from the hot runner plate 12;

[0039] The lower die assembly 2 includes a ejector plate 21 and a ejector pin plate 22 which are fixedly connected. A second cavity 211 corresponding to the first cavity 121 is provided on the side of the ejector plate 21 away from the ejector pin plate 22. A lower die insert 23 corresponding to the upper die insert 13 is provided in the second cavity 211. A plurality of lower die inserts 24 are installed on the side of the lower die insert 23 facing the upper die insert 13; A molding cavity 3 is formed between the lower die insert 24 and the upper die insert 14.

[0040] The upper sealing plate 11 is provided with a first fixing hole 111. The hot runner plate 12 is provided with a first through hole 122 corresponding to the first fixing hole 111. The upper die insert 13 is provided with an injection hole 131 corresponding to the first through hole 122; An injection nozzle 4 is fixed in the first fixing hole 111, and the other end of the injection nozzle 4 passes through the first through hole 122 and is arranged in the injection hole 131; A runner 231 is provided on the side of the lower die insert 23 facing the upper die insert 13, and the runner 231 is respectively communicated with the injection hole 131 and the lower die insert 24;

[0041] Four of the first cavity 121, the upper die insert 13, the second cavity 211 and the lower die insert 23 are arranged in an array.

[0042] Specifically, in the utility model, an "I"-shaped groove is provided on one side of the upper sealing plate 11 away from the hot runner plate 12, and first fixing holes 111 are provided at the four corners of the groove, and injection nozzles 4 are provided in the four first fixing holes 111, and the first through hole 122 is provided in the first cavity 121 and coaxially corresponds to the first fixing hole 111 and the injection hole 131 respectively, one end of the injection nozzle 4 is fixed in the first fixing hole 111, and the other end passes through the first through hole 122 and is provided in the injection hole 131 of the upper mold insert 13, wherein the injection hole 131 is also provided through the upper mold insert 13, and the other end of the injection hole 131 is connected with the branch channel 231 provided on the lower mold insert 23, and the branch channel 231 is connected with the molding cavity 3 in multiple lower mold inserts 24. During injection molding, the injection molding material flows in the groove of the upper sealing plate 11 toward the four injection nozzles 4 in the corners. After passing through the injection nozzles 4, the injection molding material enters the runner 231 of the lower mold insert 23 through the injection hole 131 on the upper mold insert 13, and then flows through the runner 231 to each lower mold insert 24 and forms a rocket head product. Among them, the hot runner plate 12 will accurately control the temperature of the injection molding material in the injection nozzle 4 and the upper mold insert 13, thereby accurately controlling the temperature of the injection molding material flowing in the runner 231, so that the flow of the injection molding material is more uniform and smooth, and the glue feeding is more balanced, so that the consistency and quality of the size of the molded product will naturally be better, thereby improving the injection molding production quality of the rocket head. In addition, due to the use of the hot runner plate 12, the injection molding material flows more evenly and smoothly in the branch channel 231. For the molding cavity 3 far away from the injection hole 131, the injection molding material can also flow smoothly into the lower mold insert 24 to form the product. Therefore, a single injection hot nozzle 4 can control more molding cavities 3 to form products, and the production capacity of the rocket head is higher.

[0043] In a specific embodiment, four upper mold inserts 13 and four lower mold inserts 23 are arranged in correspondence. Furthermore, the upper mold insert 13 and the lower mold insert 23 are respectively installed with twenty upper mold inserts 14 and twenty lower mold inserts 24; at this time, a single injection hot nozzle 4 is connected and controls twenty molding cavities 3 through a branch channel 231, and the entire mold can mold eighty rocket heads at one time in one injection molding, and its production capacity can be greatly improved compared with the solution of molding forty cavities at one time in the traditional cold runner solution.

[0044] like Figures 14 to 16 As shown, in some embodiments, the push plate 21 is provided with a plurality of second through holes 212, and the ejector plate 22 is fixedly connected with a plurality of first ejector pins 221 corresponding to the second through holes 212, one end of the first ejector pin 221 is connected to the ejector plate 22, and the other end passes through the second through hole 212 and is provided in the first ejector hole 241 of the lower mold insert 24.

[0045] Specifically, when a product that needs to be removed by opening the mold is involved, under the traction of the injection molding machine, the hot runner plate 12 and the ejector plate 21 are first separated from the mold, and then the ejector pin plate 22 drives the first ejector pin 221 to move. The first ejector pin 221 can then eject the rocket head formed within the lower mold insert 24 from the molding cavity 3, facilitating the removal of the molded rocket head.

[0046] Furthermore, the upper mold insert 13 is fixed with upper mold ejector pins, and the other ends of the upper mold ejector pins are disposed within the ejector pin holes 141 of the upper mold insert 14. There are two ejector pins, and the upper mold insert 14 is provided with two ejector pin holes 141. The ejector pins are used to form the end holes and special-shaped features of the rocket head.

[0047] Further, the ejector plate 21 is provided with a third through hole 213 in the middle of the second cavity 211. The ejector pin plate 22 is fixed with a plurality of second ejector pins corresponding to the third through hole 213, and the other ends of the second ejector pins pass through the third through hole 213 and the lower mold insert 23 and are disposed within the second ejector pin holes of the runner 231. After one injection molding structure, the second ejector pins can move upward under the drive of the ejector pin plate 22, so as to abut against the cooled injection molding material within the runner 231, and eject the injection molding material within the runner 231 and the rocket head product within the molding cavity 3 together, further facilitating the demolding and removal of the rocket head product.

[0048] Even further, there are 160 first ejector pin holes 241 and 160 ejector pin holes 141, and 20 second ejector pin holes. There are 80 of each of the two types of ejector pins, a total of 160 ejector pin holes 141, and 160 first ejector pin holes 241 are also provided within the lower mold insert 24, facilitating the first ejector pin 221 to eject the finished rocket head, and at the same time ensuring pressure balance at various positions of the rocket head during the injection molding process. The second ejector pin holes are designed for each branch runner in the runner 231. There are a total of two columns of 20 lower mold inserts 24 in one lower mold insert 23, and the branch runners connected by four lower mold inserts 24 converge within the runner 231. At this time, the second ejector pin holes can be set at the intersection of the four branch runners. When the second ejector pins eject the cooled injection molding material within the runner 231, they can also provide an ejection force for the rocket head within the lower mold insert 24, facilitating the demolding of the rocket head.

[0049] In some embodiments, the lower mold assembly 2 further includes a first baffle 25, a second baffle 26, a third baffle 27, a lower panel 28, and square iron mold feet 29; both ends of the square iron mold feet 29 are respectively connected to the ejector plate 21 and the lower panel 28; one side of the first baffle 25 is connected to the ejector pin plate 22, and the other side is connected to the second baffle 26. Both sides of the third baffle 27 are respectively connected to the second baffle 26 and the lower panel 28; the third baffle 27 is fixed with guide rods, and the ejector pin plate 22, the first baffle 25, and the second baffle 26 are all sleeved on the guide rods, and the first baffle 25 is connected with a driving device.

[0050] Specifically, after the hot runner plate 12 and the ejector plate 21 are separated for demolding, the driving device pushes the ejector pin plate 22 in the direction of the ejector plate 21 through the first baffle 25, thereby driving the first ejector pin 221 and the second ejector pin to move upward, and ejecting the molded rocket head product from the lower die insert 24. The guide rod is used to make the movement of the ejector pin plate 22 more stable and reliable.

[0051] In some embodiments, the upper mold assembly 1 further includes an upper panel 15. The upper panel 15 is provided with a locating ring 151, and the locating ring 151 is used for positioning and connecting the raw material input pipeline. Specifically, the upper panel 15 is further provided with a nozzle 152, and the nozzle 152 can introduce the molten injection raw material in the injection molding machine into the groove of the upper sealing plate 11.

[0052] In summary, the embodiment of the present utility model provides a rocket head mold. By setting the hot runner plate 12, the temperature of the injection raw material can be accurately controlled during the injection molding process. The injection raw material flows more smoothly and evenly in the sub-runner 231, and the injection raw material can better flow into each molding cavity 3 for injection molding. The quality of the injection-molded rocket head product is better and the consistency is also better, improving the yield of rocket head production. In addition, since the hot runner plate 12 controls the temperature of the injection raw material, the injection raw material can flow better and more smoothly in the sub-runner 231 to each molding cavity 3, which enables a single injection nozzle 4 to control more molding cavities 3, with higher molding efficiency and higher production capacity.

[0053] The above are only the preferred embodiments of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present utility model, several improvements and substitutions can still be made, and these improvements and substitutions should also be regarded as the protection scope of the present utility model.

Claims

1. A rocket head mold, characterized in that, It includes an upper die assembly and a lower die assembly; The upper die assembly includes a fixed upper sealing plate and a hot runner plate. On the side of the hot runner plate away from the upper sealing plate, there are a plurality of first cavities. Upper die inserts are installed in the first cavities, and a plurality of upper die inserts are installed on the side of the upper die inserts away from the hot runner plate; The lower die assembly includes a fixed ejector plate and a thimble plate. On the side of the ejector plate away from the thimble plate, there is a second cavity corresponding to the first cavity. Lower die inserts corresponding to the upper die inserts are provided in the second cavity. A plurality of lower die inserts are installed on the side of the lower die inserts facing the upper die inserts; A molding cavity is formed between the lower die inserts and the upper die inserts The upper sealing plate is provided with a first fixing hole, the hot runner plate is provided with a first through hole corresponding to the first fixing hole, and the upper die insert is provided with an injection hole corresponding to the first through hole; An injection nozzle is fixed in the first fixing hole, and the other end of the injection nozzle passes through the first through hole and is arranged in the injection hole; On the side of the lower die insert facing the upper die insert, there is a runner, and the runner is respectively communicated with the injection hole and the lower die insert; There are four first cavities, upper die inserts, second cavities and lower die inserts arranged in an array.

2. The rocket head mold according to claim 1, characterized in that, Twenty upper die inserts and twenty lower die inserts are respectively installed on the upper die insert and the lower die insert; A single runner controls the communication of twenty molding cavities.

3. The rocket head mold according to claim 1, characterized in that, The ejector plate is provided with a plurality of second through holes, and the thimble plate is fixedly connected with a plurality of first thimbles corresponding to the second through holes. One end of the first thimble is connected to the thimble plate, and the other end passes through the second through hole and is arranged in the first thimble hole of the lower die insert.

4. The rocket head mold according to claim 3, characterized in that, The upper die insert is fixed with an upper die pin, and the other end of the upper die pin is arranged in the pin hole of the upper die insert.

5. The rocket head mold according to claim 4, characterized in that, The ejector plate is provided with a third through hole in the middle of the second cavity, and the thimble plate is fixed with a plurality of second thimbles corresponding to the third through hole. The other end of the second thimble passes through the third through hole and the lower die insert and is arranged in the second thimble hole of the runner.

6. The rocket head mold according to claim 5, characterized in that, There are one hundred and sixty first thimble holes and pin holes, and twenty second thimble holes.

7. The rocket head mold according to claim 1, characterized in that, The lower die assembly further includes a first baffle, a second baffle, a third baffle, a lower panel and a square iron die foot; The two ends of the square iron die foot are respectively connected to the ejector plate and the lower panel; One side of the first baffle is connected to the thimble plate, and the other side is connected to the second baffle. The two sides of the third baffle are respectively connected to the second baffle and the lower panel; The third baffle is fixed with a guide rod, and the thimble plate, the first baffle and the second baffle are all sleeved on the guide rod, and the first baffle is connected with a driving device.

8. The rocket head mold according to claim 1, characterized in that, The upper die assembly further includes an upper panel, and the upper panel is provided with a locating ring for positioning and connecting the raw material input pipeline.

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