Injection molding device and injection molding machine

Abstract

The injection molding device comprises a mold unit and a cutting unit, the mold unit comprises a first mold and a second mold which are oppositely arranged, and a first forming groove and a second forming groove are formed in the opposite side faces of the first mold and the second mold respectively; the first forming groove comprises a plurality of first cavities and runners which are communicated with one another, and the second forming groove comprises a plurality of second cavities which are in one-to-one correspondence with the first cavities; the cutting unit comprises a plurality of cutters and a cutting driving mechanism, the cutters are arranged towards the connecting position of the first cavity and the runner, and the cutting driving mechanism is connected with the cutters to drive the cutters to move synchronously. The injection molding machine comprises an injection molding device. Compared with the prior art, the injection molding device provided by the utility model is provided with the cutting unit, and the cutter of the cutting unit can cut off a finished product and a runner aggregate before demolding, so that subsequent manual cutting and separation are not needed, and the production efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to injection molding technical field, concretely relates to a kind of injection molding device and injection molding machine. BACKGROUND

[0002] Injection molding is a method of product production molding. Products are usually molded using rubber and plastic. Injection molding machine (referred to as injection machine or injection molding machine) is the main molding equipment for making various shapes of plastic products by using thermoplastic or thermosetting material.

[0003] The mold of injection molding generally includes a cavity and a runner, especially a multi-cavity mold, each cavity is connected through the runner. During injection molding, the molten plastic fills the runner and each cavity, and after cooling, the finished product and the runner material are obtained. Then the finished product and the runner material need to be cut off and separated to obtain a single finished product.

[0004] In current production, the cutting process has low automation degree, and is generally performed by manual cutting, resulting in large amount of manpower and low production efficiency. UTILITY MODEL CONTENT

[0005] The utility model aims to overcome the above technical deficiencies and provide an injection molding device and injection molding machine to solve the technical problem that the product and the runner material obtained by the existing injection molding process are connected together and need to be cut manually.

[0006] To achieve the above technical purpose, the utility model adopts the following technical scheme:

[0007] In a first aspect, the utility model provides an injection molding device, comprising:

[0008] A mold unit comprising a first mold and a second mold arranged opposite to each other, the first mold and the second mold respectively form a first forming groove and a second forming groove on opposite sides, the first forming groove comprises a plurality of first cavities and runners connected to each other, and the second forming groove comprises a plurality of second cavities corresponding one-to-one to the first cavities;

[0009] A cutting unit comprising a plurality of cutters and a cutting drive mechanism, the cutters are arranged towards the connection between the first cavities and the runners, and the cutting drive mechanism is connected to each cutter to drive each cutter to move synchronously.

[0010] In some embodiments, the second mold forms a plurality of through holes, the cutters are slidably embedded in the through holes, the cutting edges thereof face the connection between the first cavities and the runners, and the ends thereof away from the cutting edges are connected to the cutting drive mechanism.

[0011] In some embodiments, the cutting driving mechanism comprises a cutting driver, a connecting plate and a plurality of connecting rods, the connecting rods correspond to the cutting knives one by one and one end of each connecting rod is fixedly connected with a cutting knife, the other end of each connecting rod extends out of the through hole and is fixedly connected with the connecting plate, and the cutting driver is connected with the connecting plate.

[0012] In some embodiments, the injection molding device further comprises a mold closing unit connected with the first mold to drive the first mold to move towards or away from the second mold.

[0013] In some embodiments, the first mold further comprises a plurality of mounting holes, some of which are connected with the first cavity and the rest of which are connected with the runner, and the injection molding device further comprises a demolding unit comprising a plurality of demolding mechanisms embedded in the mounting holes one by one, wherein the demolding mechanisms comprise retractable ejector blocks to separate the finished product from the first cavity and to separate the runner material from the runner.

[0014] In some embodiments, the first mold further comprises a gas supply channel connected with each of the mounting holes, and the demolding unit further comprises a gas supply mechanism connected with the gas supply channel, and the demolding mechanisms further comprise a return spring connected with the ejector blocks and the bottom surface of the mounting holes.

[0015] In some embodiments, the mounting holes comprise first mounting holes connected with the first cavity and second mounting holes connected with the runner, the demolding mechanisms comprise first demolding mechanisms arranged in the first mounting holes and second demolding mechanisms arranged in the second mounting holes, the first mounting holes are stepped holes, the ejector blocks of the first demolding mechanisms abut against the stepped surfaces of the stepped holes, the second mounting holes are straight holes, the second demolding mechanisms further comprise a lifting rod, one end of the lifting rod is fixedly connected with the bottom surface of the second mounting holes, and the other end of the lifting rod abuts against the ejector blocks of the second demolding mechanisms.

[0016] In some embodiments, the injection molding device further comprises a material receiving mechanism arranged below the first mold and the second mold to receive the finished product and the runner material.

[0017] In some embodiments, the depth of the second cavity is less than that of the first cavity.

[0018] In a second aspect, the utility model further provides an injection molding machine comprising the injection molding device.

[0019] Compared with the prior art, the injection molding device has a cutting unit, the cutter of the cutting unit is arranged towards the connection between the first cavity and the runner, the finished product and the runner condensed material can be cut off before demolding, manual cutting and separation are not needed subsequently, and the production efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a cross-sectional view of the injection molding device provided by the embodiment of the utility model;

[0021] Figure 2 is Figure 1 is an elevation view of the first mold in the first mold;

[0022] Figure 3 is Figure 1 is an elevation view of the second mold in the second mold;

[0023] Figure 4 is Figure 1 is an enlarged view of M in the second mold. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model is further described in detail below by combining with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model, and are not used to limit the utility model.

[0025] In order to solve the technical problem that the product and the runner condensed material obtained by the existing injection molding process are connected together and need to be cut manually, the utility model provides an injection molding device, which has a cutting unit, the finished product and the runner condensed material can be cut off before demolding, manual cutting and separation are not needed subsequently, and the production efficiency is improved.

[0026] Please refer to Figures 1 to 3 , Figure 1 is a cross-sectional view of the injection molding device provided by the embodiment of the utility model; Figure 2 is Figure 1 is an elevation view of the first mold in the first mold; Figure 3 is Figure 1 is an elevation view of the second mold in the second mold. The injection molding device comprises a mold unit 1 and a cutting unit 2.

[0027] The mold unit 1 comprises a first mold 11 and a second mold 12 arranged oppositely, wherein the first mold 11 and the second mold 12 are respectively formed with a first forming groove and a second forming groove on opposite sides. The first forming groove comprises a plurality of first cavities 111 and runners 112 in communication with each other, and the second forming groove comprises a plurality of second cavities 121 corresponding to the first cavities 111 one by one. When the first mold 11 and the second mold 12 are closed, the first cavities 111 and the second cavities 121 oppositely form cavities for shaping finished products. The runner 112 further forms an interface on the outer surface of the first mold 11 for connecting a molten plastic supply device.

[0028] The cutting unit 2 comprises a plurality of cutters 21 and a cutting driving mechanism 22, wherein the cutters 21 are respectively arranged towards the junctions of the first cavities 111 and the runners 112. The cutting driving mechanism 22 is connected with each of the cutters 21 to drive synchronous movement of each of the cutters 21 to cut off the finished products and the runner materials. In some embodiments, the cutters 21 can be driven to move to cut off the finished products and the runner materials after the molten plastic is solidified. In another embodiment, the cutters 21 can be driven to move to cut off the finished products and the runner materials when the molten plastic is injected but not yet solidified.

[0029] In some embodiments, the depth of the second cavities 121 is less than that of the first cavities 111, so that after the molten plastic is solidified, the first mold 11 and the second mold 12 are opened, and the finished products and the runner materials are located in the first mold 11.

[0030] In some embodiments, the second mold 12 is formed with a plurality of through holes, and the cutters 21 are correspondingly slidably embedded in the through holes with the cutting edges facing the junctions of the first cavities 111 and the runners 112. The end of the cutters 21 away from the cutting edges is connected with the cutting driving mechanism 22.

[0031] In some embodiments, the cutting driving mechanism 22 comprises a cutting driver 221, a connecting plate 222 and a plurality of connecting rods 223, wherein the connecting rods 223 correspond to the cutters 21 one by one, one end of the connecting rods 223 is located in the through holes and fixedly connected with the cutters 21, the other end of the connecting rods 223 extends out of the through holes and is fixedly connected with the connecting plate 222, and the cutting driver 221 is connected with the connecting plate 222. The cutting driver 221 can be a pneumatic cylinder, an oil cylinder or an electric push rod, etc., which drives synchronous movement of each of the cutters 21 through the connecting plate 222 and the connecting rods 223.

[0032] In some embodiments, the injection molding device further comprises a clamping unit 3 connected to the first mold 11 to drive the first mold 11 to move towards or away from the second mold 12. The clamping unit 3 preferably adopts a hydraulic cylinder to provide driving force, which can be directly connected to the first mold 11 or indirectly connected through a suitable transmission mechanism. In other embodiments, the clamping unit 3 can also be connected to the second mold 12. However, since the second mold 12 is provided with a cutting driving mechanism 22, it is more optimal to connect the clamping unit 3 to the first mold 11 to simplify the arrangement difficulty of the equipment.

[0033] Please refer to Figure 1 and Figure 4 , Figure 4 is Figure 1 a magnified view of M in FIG. 1. In some embodiments, the injection molding device further comprises an ejection unit 4, which comprises a plurality of ejection mechanisms 41. The first mold 11 is further formed with a plurality of mounting holes, some of which are connected to the first cavity 111, and the rest of which are connected to the runner 112. The ejection mechanisms 41 are embedded in the mounting holes one by one. The ejection mechanism 41 comprises a retractable ejector block 411 to separate the finished product from the first cavity 111 and to separate the runner material from the runner 112. It is easy to understand that the shape of the ejector block 411 towards the ejection surface of the first cavity 111 should match the shape of the corresponding part of the finished product, that is, when the ejection mechanism 41 is in the non-ejection state, the ejection surface of the ejector block 411 also participates in the forming of the finished product.

[0034] In some embodiments, the first mold 11 is further formed with a gas supply channel 113 connected to each mounting hole, and the ejection unit 4 further comprises a gas supply mechanism (not shown) connected to the gas supply channel. The ejection mechanism 41 further comprises a return spring 412 connected to the ejector block 411 and the bottom surface of the mounting hole. That is, in the form of pneumatic ejection, the gas supply mechanism supplies gas to the gas supply channel 113 to pressurize, so that the ejector block 411 is ejected to separate the finished product from the first cavity 111 and the runner material from the runner 112. Then the gas supply mechanism stops supplying gas, and the return spring 412 pulls the ejector block 411 back to its original position.

[0035] The cross-sectional shape of the ejector block 411 matches the cross-sectional shape of the mounting hole, so that the ejector block 411 can slide smoothly in the mounting hole, and there is no large gap between them, which can cause significant gas leakage.

[0036] In the preferred embodiment, the ejector block 411 also has a gas vent groove connecting the opposite surface of its side surface and ejection surface. When the ejector block 411 is ejected to a certain distance to eject the finished product or runner material, the gas vent groove is connected to the outside, the internal pressure is released, so that the ejector block 411 will not continue to move outward and completely slide out of the mounting hole, so as to facilitate the return of the return spring 412.

[0037] In some embodiments, the mounting hole includes a first mounting hole communicating with the first cavity 111 and a second mounting hole communicating with the flow channel 112, and the demolding mechanism 41 includes a first demolding mechanism 41A arranged in the first mounting hole and a second demolding mechanism 41B arranged in the second mounting hole. The first mounting hole is a stepped hole, and the top block 411 of the first demolding mechanism 41A abuts against the stepped surface of the stepped hole. The second mounting hole is a straight hole, and the second demolding mechanism 41B further includes a top rod 413, one end of which is fixedly connected with the bottom surface of the second mounting hole, and the other end of which abuts against the top block 411 of the second demolding mechanism 41B. The stepped hole and the top rod 413 are both used to limit the top block 411 from moving inwardly under the pressure of the molten plastic. Generally, the finished product has a large size, and there is a wide space for arranging the stepped hole. The flow channel has a small size, and the top rod 413 can be used to achieve the same technical effect due to the size limitation. It is easy to understand that, in other embodiments, the first mounting hole and the first demolding mechanism 41A can be adopted, or the second mounting hole and the second demolding mechanism 41B can be adopted.

[0038] In some embodiments, the injection molding device further includes a receiving mechanism 5 arranged below the first mold 11 and the second mold 12, used to receive the finished product and the flow channel condensed material. Since the finished product and the flow channel condensed material have different shapes and sizes, only simple separation is needed to obtain the required finished product.

[0039] In other embodiments, the utility model also provides an injection molding machine, which includes the above-mentioned injection molding device. The injection molding machine also includes a machine shell, a slide rail bearing the first mold 11 and other components.

[0040] In order to better understand the utility model, the following will be combined with Figures 1 to 4 The technical scheme of the utility model is described in detail as follows: the mold clamping unit 3 pushes the first mold 11 and the second mold 12 to be clamped, the molten plastic supply device injects molten plastic into the flow channel 112, after the plastic solidifies, the cutting drive mechanism 22 drives the cutter 21 to cut off the finished product and the flow channel condensed material. The mold clamping unit 3 pulls the first mold 11 and the second mold 12 to be separated, the demolding mechanism 41 ejects the finished product and the flow channel condensed material, which falls into the receiving mechanism 5, and then the required finished product can be obtained after separation.

[0041] The specific embodiments of the utility model described above do not constitute a limitation on the protection scope of the utility model. Any other corresponding changes and modifications made according to the technical concept of the utility model should be included in the protection scope of the claims of the utility model.

Claims

1. An injection molding apparatus characterized by comprising: The injection molding device comprises: a mold unit comprising a first mold and a second mold arranged oppositely, the first mold and the second mold are respectively formed with a first forming groove and a second forming groove on opposite sides, the first forming groove comprises a plurality of first cavities and runners in communication with each other, and the second forming groove comprises a plurality of second cavities corresponding to the first cavities one by one; a cutting unit comprising a plurality of cutters and a cutting driving mechanism, the cutters are arranged towards the junctions of the first cavities and the runners respectively, and the cutting driving mechanism is connected with each of the cutters to drive synchronous movement of each of the cutters.

2. The injection molding apparatus of claim 1, wherein The second mold is formed with a plurality of through holes, the cutters are correspondingly slidably embedded in the through holes, the cutting edges of the cutters are directed towards the junctions of the first cavities and the runners, and the ends away from the cutting edges of the cutters are connected with the cutting driving mechanism.

3. The injection molding apparatus of claim 2, wherein The cutting driving mechanism comprises a cutting driver, a connecting plate and a plurality of connecting rods, the connecting rods correspond to the cutters one by one, one end of each of the connecting rods is fixedly connected with the corresponding cutter, the other end of each of the connecting rods extends out of the through hole and is fixedly connected with the connecting plate, and the cutting driver is connected with the connecting plate.

4. The injection molding apparatus of claim 1, wherein The injection molding device further comprises a mold closing unit connected with the first mold to drive the first mold to move towards or away from the second mold.

5. The injection molding apparatus of claim 1, wherein The first mold is further formed with a plurality of mounting holes, part of the mounting holes are in communication with the first cavities, and the rest of the mounting holes are in communication with the runners; the injection molding device further comprises an ejection unit, the ejection unit comprises a plurality of ejection mechanisms, the ejection mechanisms are embedded in the mounting holes one by one, the ejection mechanisms comprise retractable ejecting blocks to separate the finished products from the first cavities and to separate the runner clumps from the runners.

6. The injection molding apparatus of claim 5, wherein The first mold is further formed with a gas supply channel in communication with each of the mounting holes, the ejection unit further comprises a gas supply mechanism in communication with the gas supply channel, and the ejection mechanisms further comprise return springs connected with the ejecting blocks and the bottom surfaces of the mounting holes.

7. The injection molding apparatus of claim 6, wherein The mounting holes comprise first mounting holes in communication with the first cavities and second mounting holes in communication with the runners, the ejection mechanisms comprise first ejection mechanisms arranged in the first mounting holes and second ejection mechanisms arranged in the second mounting holes; the first mounting holes are stepped holes, the ejecting blocks of the first ejection mechanisms abut against the stepped surfaces of the stepped holes; the second mounting holes are straight holes, the second ejection mechanisms further comprise ejecting rods, one end of each of the ejecting rods is fixedly connected with the bottom surface of the corresponding second mounting hole, and the other end of each of the ejecting rods abuts against the ejecting block of the corresponding second ejection mechanism.

8. The injection molding apparatus of claim 1, wherein The injection molding device further comprises a material receiving mechanism arranged below the first mold and the second mold to receive the finished products and the runner clumps.

9. The injection molding apparatus of claim 1, wherein The depth of the second cavities is less than that of the first cavities.

10. An injection molding machine characterized by, The injection molding device comprises any one of claims 1-9. The injection molding device comprises any one of claims 1-9.

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