Covering part mold sprue and injection mold
By employing a seam groove and needle valve gate structure in the mold for covering parts, the problems of bulging and pitting at the gate location were solved, improving the appearance quality of the parts and reducing the workload of workers.
Patent Information
- Application Number
- CN202422646880.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-30
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-10-30
AI Technical Summary
In existing technologies, bulges or pits are easily generated at the gate of the coated parts, which affects the appearance quality and increases the workload of workers.
Design a gating gate for a covered part mold, using a seam groove and needle valve gating structure. The hot runner valve needle opens and retracts to form a valve gating hole. The feed channel is cut off after pressure holding to avoid gating residue.
It eliminates unevenness at the gate location, ensures the appearance quality of the covered parts, reduces the workload of workers cutting the gate, and improves production efficiency.
Smart Images
Figure CN223657473U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to injection mold technical field, concretely relates to the sprue of cladded part mold and injection mold. BACKGROUND
[0002] The cladded part is a part with a layered structure on the outside, for example, an automobile trim part, which is coated with a layer of skin on the outside.
[0003] In order to reduce the warping of the part and reduce the molding pressure, the number of sprues is usually increased, the product uses a cold runner to feed, and the production workers need to cut the sprues, which increases the workload of the workers and affects the production rhythm.
[0004] If the feeding port is designed on the product, the trimming problem of the sprue can be avoided, and the workload of the workers for cutting the sprues is reduced. However, if the sprue is directly designed on the product, problems may occur in the appearance area, and during the subsequent cladding process, due to the expansion of the hot runner, the actual part at the sprue position is not flat, and after the cladding skin is covered, bulges or pits may occur at the sprue position, which reduces the quality of the cladded part. SUMMARY
[0005] Therefore, the utility model provides a cladded part mold sprue and an injection mold to solve the problem of bulges or pits at the sprue position of the cladded part in the prior art.
[0006] In a first aspect, the utility model provides a cladded part mold sprue, which comprises: a mold body, the mold body has a suture groove, and a recess is arranged in the suture groove; a needle valve sprue is arranged in the recess, the shape of the needle valve sprue is matched with the shape of the recess, the height of the needle valve sprue is not higher than the depth of the suture groove, during molding, the hot runner valve needle is opened, the valve needle is retracted, and the bottom of the suture groove forms a valve sprue hole; a hot runner is connected with the suture groove and the cavity to form a feeding channel, so that after the pressure maintaining technology, the hot runner valve needle is closed, the feeding channel is cut off, the valve needle seals the product, and there is no residue at the sprue position of the product.
[0007] In some embodiments, the needle valve sprue is a disc.
[0008] In some embodiments, the diameter of the needle valve sprue is 2.8-3.2 mm.
[0009] In some embodiments, the depth of the needle valve sprue is 0.6-1.0 mm.
[0010] In some embodiments, the inner walls of the opposite sides of the suture groove respectively extend backward to form the recess.
[0011] The utility model provides a kind of injection mold, including the die gate of any one.
[0012] The utility model has the beneficial effects that:
[0013] The utility model provides a kind of injection mold, including the die gate of any one. BRIEF DESCRIPTION OF DRAWINGS
[0014] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained without creative labor.
[0015] Figure 1 It is the partial enlarged structure schematic diagram of the die gate of the covered part mold of an embodiment of the utility model;
[0016] Figure 2 It is the three-dimensional structure schematic diagram of the die gate of the covered part mold of another embodiment of the utility model in use state.
[0017] Mark explanation: 110, die body;101, suture slot;102, recess;103, valve gate hole;120, needle valve gate. DETAILED DESCRIPTION
[0018] In order to make the purpose, technical scheme and advantage of the embodiments of the utility model clearer, the following will combine the drawings in the embodiments of the utility model, and the technical scheme in the embodiments of the utility model is clearly and completely described, obviously, the described embodiments are part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the utility model.
[0019] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0020] In the description of the utility model, it needs to explain, the term "center", "upper", "lower", "left", "right", "vertical", "horizontal", "internal", "external" and so on indicate the orientation or positional relationship is based on the orientation or positional relationship shown in the drawing, only for the convenience of describing the utility model and simplifying the description, and not indicating or implying that the indicated device or element must have a particular orientation, a particular orientation and operation, therefore, it cannot be understood as a limitation on the utility model. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.
[0021] In addition, the technical features involved in the different embodiments of the utility model described below can be combined with each other as long as there is no conflict.
[0022] The embodiments of the utility model are described below in combination with Figure 1 And Figure 2 .
[0023] As Figure 1 shown, according to the embodiment of the utility model, a kind of cladding part mold gate is provided, cladding part mold gate includes: mold body 110, mold body 110 has seam slot 101, recess 102 is provided in seam slot 101;Needle valve gate 120, it is located in recess 102, the shape of needle valve gate 120 is compatible with the shape of recess 102, the height of needle valve gate 120 is not higher than the depth of seam slot 101, when forming, hot runner valve needle opens, valve needle retreats, the bottom of seam slot forms valve gate hole 103;Hot runner, it is connected with seam slot 101 and cavity to form feed channel, so that after pressure maintaining technology, hot runner valve needle closes, cut off the feed channel, so that valve needle seals flat product, product gate place has no residue.
[0024] In this embodiment, the mold gate for the coated part includes a mold body 110 and a needle valve gate 120. A stitch groove 101 is formed on the mold body 110. The stitch groove 101 is an elongated groove. A recess 102 is formed on the stitch groove 101, and the needle valve gate 120 is disposed within the recess 102. A valve gate hole 103 is arranged around the needle valve gate 120. The height of the needle valve gate 120 is lower than the depth of the stitch groove 101, which can prevent the adhesive from spreading to the outside of the stitch groove 101.
[0025] like Figure 2 As shown, during injection, the rubber material enters the needle valve gate 120 and then enters the valve gate orifice 103. The width of the valve gate orifice 103 is 0.1 mm to 0.3 mm, preferably 0.2 mm. The diameter of the valve gate orifice 103 is 3.2 mm. The rubber material entering the valve gate orifice 103 then enters the seam groove 101 and enters the hot runner through the seam groove 101. One end of the distribution channel is connected to the seam groove 101, and the other end of the distribution channel is connected to the cavity, allowing the rubber material to enter the cavity for molding through the distribution channel. By using the seam groove 101 for injection, the seam groove 101 can slow down the speed of the rubber material during injection molding, achieving a certain cooling effect. This eliminates unevenness at the gate position of the injection molded part, avoids bulges or pits at the gate position, ensures the appearance of the encapsulated part, and improves customer satisfaction.
[0026] Furthermore, the inner walls on opposite sides of the seam groove 101 extend backwards to form grooves 102, which increases the feeding area and simplifies the structural design.
[0027] Furthermore, the needle valve gate 120 is a disc, which makes the feeding more uniform.
[0028] In this embodiment, the diameter of the needle valve gate 120 is 2.8 mm to 3.1 mm, preferably 3.0 mm, and the depth of the needle valve gate 120 is 0.6 mm to 1.0 mm, preferably 0.8 mm.
[0029] This utility model also provides an injection mold, which includes the gate of any of the above. Parts molded using this injection mold will not have bulges or unevenness at the gate location, resulting in better appearance quality.
[0030] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation.
[0031] For those skilled in the art, various variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom remain within the protection scope of this invention.
Claims
1. A gating gate for a mold used to cover parts, characterized in that, include: The mold body (110) has a stitch groove (101) and a groove (102) is provided in the stitch groove (101); A needle valve gate (120) is provided in the groove (102). The shape of the needle valve gate (120) is adapted to the shape of the groove (102). The height of the needle valve gate (120) is not higher than the depth of the suture groove (101). The hot runner connects the seam groove (101) to the cavity to form a feeding channel, so that after the pressure holding technology, the hot runner valve needle closes and cuts off the feeding channel, so that the valve needle seals the product and there is no residue at the product gate.
2. The gating gate of the mold for covering parts according to claim 1, characterized in that, The needle valve gate (120) is a disc.
3. The gating gate of the mold for covering parts according to claim 2, characterized in that, The diameter of the needle valve gate (120) is 2.8 mm to 3.2 mm.
4. The gating gate of the mold for covering parts according to claim 2, characterized in that, The depth of the needle valve gate (120) is 0.6 mm to 1.0 mm.
5. The gate of the mold for the coated part according to any one of claims 1 to 4, characterized in that, The inner walls on opposite sides of the suture groove (101) extend backwards to form the groove (102).
6. An injection mold, characterized in that, Includes the mold gate as described in any one of claims 1 to 5.