Injection mold structure and injection molding equipment

Abstract

The utility model discloses an injection mold structure and injection molding equipment, and relates to the technical field of injection molds, the injection mold structure comprises a first mold, the mold closing side of the first mold is provided with at least one product profile groove, at least one injection molding runner and at least one extension groove, the extension groove is arranged close to the injection molding runner, the injection molding runner communicates with the product profile groove, and the injection molding runner communicates with the product profile groove; and the extension groove communicates with the injection molding runner through the sub-runner. According to the injection mold structure, an original mold used for the automobile outer stand column ornament is effectively utilized, under the condition that the original mold structure is not changed too much, the extension groove is formed in the position of the waste material head and used for forming the supporting structure, and then flow guiding of the branch flow channel is matched; the automobile outer stand column ornament and the supporting structure can be formed under the same die without additionally arranging a die, and the manufacturing cost of the supporting structure is effectively reduced.

Description

Technical Field

[0001] The present application relates to the technical field of injection molds, and in particular to an injection mold structure and injection molding equipment. Background Art

[0002] Automotive interior and exterior parts are typically injection molded. However, due to limitations in mold structure and product shape, they often have design flaws during normal use.

[0003] There are generally three solutions for attaching automotive exterior pillar trims to body sheet metal: 1. Utilizing the rib structure on the back of the exterior pillar trim, double-sided tape is attached to the rib structure. This tape is then attached to the body sheet metal to ensure that the exterior pillar is properly installed on the vehicle body. However, this solution has drawbacks: the adhesion area between the double-sided tape and the exterior pillar body is small, and the adhesion strength is insufficient. This can cause the tape to separate from the exterior pillar during driving, resulting in poor market performance. 2. Attaching the exterior pillar trim to the vehicle body is accomplished by installing double-sided adhesive foam. This has the drawback that the adhesive foam has a low density and cannot provide effective support. 3. Setting a support structure in the attachment area of the exterior pillar trim is accomplished by attaching the support structure to the exterior pillar trim using double-sided adhesive. However, setting up the support structure requires opening a new set of molds, which increases costs. Utility Model Content

[0004] The present application aims to solve one of the above-mentioned technical problems in the prior art. To this end, an embodiment of the present application provides an injection mold structure.

[0005] An embodiment of the present application also provides an injection molding device.

[0006] According to an embodiment of the first aspect of the present application, an injection mold structure is provided, including a first mold, wherein the clamping side of the first mold is provided with at least one product mold groove, at least one injection runner and at least one expansion groove, the expansion groove is arranged close to the injection runner, the injection runner is connected to the product mold groove, and the expansion groove is connected to the injection runner through a branch channel.

[0007] The above-mentioned injection mold structure has at least the following beneficial effects: effectively utilizing the mold originally used for automobile exterior pillar trim, according to the shape of the support structure of scheme three, an expansion groove for injection molding of the support structure is set at the waste head position of the first mold for automobile exterior pillar trim, the waste head position is the setting position of the injection runner, the expansion groove is set close to the injection runner, and the injection liquid in the injection runner is drained to the expansion groove to form the support structure through the branch channel, while not affecting the injection molding of the original product. Without making too many changes to the original mold structure, the automobile exterior pillar trim and the support structure can be formed under the same mold without adding a new mold, thereby effectively reducing the manufacturing cost of the support structure.

[0008] According to the injection mold structure described in the embodiment of the first aspect of the present application, the injection runner has a bending section, and the branch runner is connected to the side wall of the bending section.

[0009] According to the injection mold structure described in the embodiment of the first aspect of the present application, the tangent direction of the connection between the branch channel and the bending section is perpendicular to the length direction of the branch channel.

[0010] According to the injection mold structure described in the embodiment of the first aspect of the present application, the first mold has a cooling liquid channel, and the bending section is arranged around the periphery of the cooling liquid channel.

[0011] According to the injection mold structure described in the embodiment of the first aspect of the present application, the injection runner also includes a first section and a second section arranged relatively to each other, the first section and the second section are connected by the bending section, a third section is provided on the first section or the second section, the third section is not parallel to the first section or the second section, and the third section is connected to the product groove.

[0012] According to the injection mold structure described in the embodiment of the first aspect of the present application, the third section is perpendicular to the first section or the second section.

[0013] According to the injection mold structure described in the embodiment of the first aspect of the present application, the length direction of the extension groove is perpendicular to the length direction of the product groove, and the end of the branch channel is connected to the end side wall of the extension groove.

[0014] According to the injection mold structure described in the embodiment of the first aspect of the present application, the setting position of the product groove is higher than the expansion groove, and the product groove is set at an angle.

[0015] According to the injection mold structure described in the embodiment of the first aspect of the present application, the ratio of the width of the injection runner to the width of the branch runner is in the range of 3:1 to 5:1.

[0016] According to an embodiment of the second aspect of the present application, an injection molding device is provided, comprising the injection mold structure described above.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present application is further described below with reference to the accompanying drawings and embodiments;

[0019] Figure 1 This is a schematic diagram of the structure of the first mold in the embodiment of the present application. Figure 1 ;

[0020] Figure 2 yes Figure 1 A magnified schematic diagram of point A in the middle;

[0021] Figure 3 This is a schematic diagram of the structure of the first mold in the embodiment of the present application. Figure 2 ;

[0022] Figure 4 yes Figure 3 Enlarged schematic diagram of point B in the middle.

[0023] Reference numerals: first mold 100 , product groove 110 , expansion groove 130 , first section 141 , bending section 142 , second section 143 , third section 144 , coolant channel 150 , diversion channel 160 . DETAILED DESCRIPTION

[0024] This section will describe the specific embodiments of the present application in detail. The preferred embodiments of the present application are shown in the accompanying drawings. The purpose of the accompanying drawings is to supplement the description of the text part of the specification with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present application, but it cannot be understood as a limitation on the scope of protection of the present application.

[0025] In the description of this application, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on this application.

[0026] In the description of this application, "several" means one or more, "many" means more than two, "greater than," "less than," and "exceed" are understood to exclude the number itself, while "above," "below," and "within" are understood to include the number itself. The terms "first" and "second" are used solely to distinguish technical features and are not to be construed as indicating or implying relative importance, or as implicitly specifying the number or order of the technical features indicated.

[0027] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, and connecting should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0028] To improve the adhesion strength between the automotive exterior pillar trim and the vehicle body sheet metal, a support structure is provided in the attachment area of the automotive exterior pillar trim. The support structure is adhered to the exterior pillar trim using double-sided adhesive. The support structure on the automotive exterior pillar trim is then adhered to the vehicle body using double-sided adhesive. To improve the production of the support structure, this applicant modified the existing production mold for the automotive exterior pillar trim without creating a new mold.

[0029] Reference Figures 1 to 4 The present application provides an injection mold structure. Specifically, the injection mold structure includes a first mold 100. The clamping side of the first mold 100 is provided with at least one product mold groove 110, at least one injection runner and at least one expansion groove 130. The expansion groove 130 is arranged close to the injection runner, and the injection runner is connected to the product mold groove 110. The expansion groove 130 is connected to the injection runner through a branch channel 160.

[0030] Among them, the product mold groove 110 is used for injection molding of automobile exterior pillar trim, the injection runner is used for diversion and transportation of injection liquid, and the external injection tube transports the injection liquid to the product mold groove 110 through the injection runner. The injection liquid is cooled in the product mold groove 110 to form the required product shape.

[0031] The improvement of the above-mentioned injection mold structure effectively utilizes the mold originally used for automobile outer pillar trim. According to the shape of the supporting structure, an extension groove 130 for injection molding of the support structure is set at the waste head position of the first mold 100 used for automobile outer pillar trim. The waste head position is the setting position of the injection runner. The extension groove 130 is set close to the injection runner, and the injection liquid in the injection runner is drained to the extension groove 130 through the branch channel 160 to form the support structure. At the same time, it does not affect the injection molding of the original product. Without making too many changes to the original mold structure, the automobile outer pillar trim and the support structure can be formed under the same mold without re-adding molds, which effectively solves the problem of reducing the manufacturing cost of the support structure.

[0032] The injection molding runner has a bend section 142, and the branch channel 160 is connected to the side wall of the bend section 142. The provision of the bend section 142 can reduce the impact of the injection molding liquid. Generally, during injection molding, the injection molding liquid is pressurized and enters the product mold groove 110 through the injection molding runner. The provision of the bend section 142 can effectively reduce the impact of the injection molding liquid.

[0033] Furthermore, the sidewall of the branch channel 160 connecting to the curved section 142 can further mitigate the impact of the injection liquid entering the branch channel 160, and the injection liquid flowing into the branch channel 160 is also slow. Because the curved section 142 changes the direction of the injection liquid, it is prevented from directly impacting the branch channel 160. It also further prevents the injection liquid from overflowing from the branch channel 160 and the expansion groove 130, thereby improving the quality of the injection molding. When the product injection molding is completed, the support structure in the expansion groove 130 can be simultaneously completed.

[0034] In some specific embodiments, the tangent direction of the connection between the diverter channel 160 and the bend section 142 is perpendicular to the length direction of the diverter channel 160. This arrangement further slows down the speed of the injection liquid entering the diverter channel 160, effectively preventing the newly added diverter channel 160 and the expansion groove 130 from overflowing.

[0035] In some embodiments, the first mold 100 has a coolant channel 150 for circulating coolant. Coolant is introduced into the coolant channel 150 to lower the temperature of the first mold 100, ensuring smooth molding of the molding liquid after injection. The bent section 142 is disposed around the periphery of the coolant channel 150. This effectively lowers the temperature of the molding liquid at the injection runner near the end of injection molding, ensuring rapid molding of the molding liquid at the waste head. In specific embodiments, water or other cooling liquids may be introduced into the coolant channel 150.

[0036] In some embodiments, the injection molding runner further includes a first section 141 and a second section 143 disposed opposite each other, the first section 141 and the second section 143 being connected by a bent section 142. Specifically, one end of the first section 141 is connected to one end of the second section 143 via the bent section 142. The first section 141 and the second section 143 may be disposed in parallel, or they may be inclined toward each other or disposed in other ways other than parallel, so that the entire injection molding runner is curved, thereby effectively mitigating the impact of the injection molding liquid on the product mold groove 110. In the embodiment of the present application, the first section 141 and the second section 143 are both straight sections.

[0037] Furthermore, a third section 144 is provided on the first section 141 or the second section 143. The third section 144 is not parallel to the first section 141 or the second section 143 and is connected to the product mold groove 110. When the third section 144 is provided on the first section 141, the second section 143 serves as the inlet section for the injection molding liquid and the third section 144 is not parallel to the first section 141. When the third section 144 is provided on the second section 143, the second section 143 serves as the inlet section for the injection molding liquid and the third section 144 is not parallel to the second section 143.

[0038] Specifically, the third section 144 is perpendicular to the first section 141 or the second section 143. When the third section 144 is disposed on the first section 141, the second section 143 serves as the inlet section for the injection molding liquid, and the third section 144 is perpendicular to the first section 141; when the third section 144 is disposed on the second section 143, the second section 143 serves as the inlet section for the injection molding liquid, and the third section 144 is perpendicular to the second section 143.

[0039] In the embodiment provided herein, the third section 144 is disposed within the second section 143, and the length of the third section 144 is perpendicular to the length of the second section 143. The addition of the third section 144 further mitigates the impact pressure of the injection liquid, allowing the injection liquid to enter the product mold groove 110 evenly and slowly, thereby reducing problems such as air holes caused by the impact and improving molding quality.

[0040] In some examples, the length of the expansion groove 130 is perpendicular to the length of the product groove 110, and the end of the branch channel 160 communicates with the end sidewall of the expansion groove 130. Because the support structure is relatively long, the length of the expansion groove 130 used to form the support structure is perpendicular to the length of the product groove 110. This reduces the mold space occupied by the additional structure and further reduces the risk of overflow during the injection molding process.

[0041] The end of the diverter channel 160 is connected to the end side wall of the expansion groove 130, and the extension direction of the diverter channel 160 is on the same straight line as the extension direction of the expansion groove 130. Because the width of the diverter channel 160 is relatively small, the linear diverter channel 160 can avoid the situation where the injection liquid cannot reach the expansion groove 130 due to the low flow rate of the injection liquid, ensuring that there is enough injection liquid entering the expansion groove 130 to complete the injection molding of the support structure.

[0042] It should be noted that if Figure 1 and Figure 2 As shown, in the embodiment of the present application, the expansion groove 130 is set at a position lower than the injection channel, and the branch channel 160 has a certain slope, which can effectively guide the injection liquid into the expansion groove 130.

[0043] In some embodiments, the product groove 110 is positioned higher than the expansion groove 130 and is tilted. Specifically, the product groove 110 is positioned higher than the injection runner, which in turn is positioned higher than the expansion groove 130. Positioning the product groove 110 higher than the injection runner can reduce the rate at which the injection molding liquid flows into the product groove 110, ensuring that the injection molding liquid evenly fills the product groove 110. The tilted product groove 110 also facilitates product formation.

[0044] In some embodiments, the ratio of the width of the injection molding runner to the width of the branch runner 160 is in the range of 3:1 to 5:1. In the embodiment of the present application, the ratio of the width of the injection molding runner to the width of the branch runner 160 is set to 3:1. Specifically, the length of the injection molding runner is set to 9 to 15 mm, and the width of the injection molding runner is set to 1 to 2 mm.

[0045] In some embodiments shown in the present application, two product-type grooves 110 are provided on the first mold 100, and the two product-type grooves 110 are stacked and provided on the first mold 100. The two product-type grooves 110 are inclined, and each product-type groove 110 corresponds to a separate injection channel, and each injection channel extends a branch channel 160 connected to the expansion groove 130. The number of expansion grooves 130 is consistent with the number of product-type grooves 110, so as to avoid the setting of multiple expansion grooves 130 affecting the original injection pressure and injection quality.

[0046] Specifically, an embodiment of the present application further provides an injection molding device, which includes the above-mentioned injection mold structure.

[0047] Furthermore, the injection molding equipment also includes a second mold, which can move to be molded with the first mold 100. The second mold is provided with a mold closing groove that matches the product groove 110. After the second mold is molded with the first mold 100, the mold closing groove and the product groove 110 form a product cavity. The injection molding liquid is injected into the product cavity through the injection runner. After the injection molding liquid fills the product cavity, a cooling operation is performed so that the injection molding liquid is cooled according to the shape of the product cavity to form the desired product.

[0048] Because of the presence of expansion groove 130, which diverts a portion of the injection molding liquid used to form the product to the expansion groove 130, the support structure is formed there. This allows the automotive exterior pillar trim and the support structure to be molded in the same mold. After molding, the automotive exterior pillar trim is removed from the product mold groove 110. The cooled injection molding liquid in the injection mold flow channel forms a waste head that connects to the formed automotive exterior pillar trim. The waste head is then trimmed and the support structure is removed.

[0049] When attaching the automotive exterior pillar trim to the body sheet metal, apply V720 primer to both sides of the support structure (the support structure in this application is a straight plastic sheet with a thickness that gradually decreases from one end to the other). Then, apply 3M double-sided tape to both sides of the support structure. Then, apply V720 primer to the corresponding position of the automotive exterior pillar. After attaching the support structure to the corresponding position of the automotive exterior pillar trim, the automotive exterior pillar is attached to the body sheet metal. This ensures that the automotive exterior pillar trim has a good appearance, strengthens the connection strength between the automotive exterior pillar trim and the body, reduces the problem of detachment during vehicle driving, and improves the user experience.

[0050] The embodiments of the present application are described in detail above in conjunction with the accompanying drawings, but the present application is not limited to the above embodiments. Various changes can be made within the scope of knowledge possessed by ordinary technicians in the technical field without departing from the purpose of the present application.

Claims

1. An injection mold structure, characterized in that: It includes a first mold, and the clamping side of the first mold is provided with at least one product groove, at least one injection runner and at least one expansion groove. The expansion groove is arranged close to the injection runner, the injection runner is connected to the product groove, and the expansion groove is connected to the injection runner through a branch channel.

2. The injection mold structure according to claim 1, characterized in that: The injection molding runner has a bending section, and the branch runner is connected to the side wall of the bending section.

3. The injection mold structure according to claim 2, characterized in that: A tangent direction of a connection between the branch channel and the bending section is perpendicular to a length direction of the branch channel.

4. The injection mold structure according to claim 2, characterized in that: The first mold has a cooling liquid channel, and the bending section is arranged around the outer periphery of the cooling liquid channel.

5. The injection mold structure according to claim 2, characterized in that: The injection molding runner also includes a first section and a second section arranged opposite to each other, the first section and the second section are connected by the bending section, a third section is provided on the first section or the second section, the third section is not parallel to the first section or the second section, and the third section is connected to the product groove.

6. The injection mold structure according to claim 5, characterized in that: The third segment is perpendicular to the first segment or the second segment.

7. The injection mold structure according to any one of claims 1 to 6, characterized in that: The length direction of the expansion groove is perpendicular to the length direction of the product groove, and the end of the branch channel is connected to the end side wall of the expansion groove.

8. The injection mold structure according to any one of claims 1 to 6, characterized in that: The product-shaped groove is arranged at a position higher than the expansion groove, and the product-shaped groove is arranged at an angle.

9. The injection mold structure according to any one of claims 1 to 6, characterized in that: The ratio of the width of the injection flow channel to the width of the branch flow channel is in the range of 3:1 to 5:

1.

10. An injection molding device, characterized in that: The invention comprises the injection mold structure according to any one of claims 1 to 9.

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