Plastic mould pitched roof anti-loosening structure
By designing the limit clamping design of the steps and protrusions combined with the mold core cavity on the oblique head of the plastic mold, the problem of poor fixation of the oblique top structure is solved, which significantly reduces looseness and rebound during the injection molding process and improves the appearance of the product Quality and pass rate.
Patent Information
- Application Number
- CN202420253615.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-02-01
- Publication Date
- 2024-12-31
- Estimated Expiration
- 2034-02-01
AI Technical Summary
During the injection molding process of plastic molds, the fixedness of the oblique top structure is poor, which causes the oblique head to sink and rebound during high pressure of injection molding, resulting in poor product appearance and affecting the pass rate. Especially in meat-thick products, the failure rate is as high as 60%.
A plastic mold slanted top anti-loose structure is designed, with a 7-shaped head, and a step and protruding end is provided with steps and protruding. Combined with the multi-stage limit and clamping design of the mold core cavity, it enhances the fixing effect and avoids rebound.
It effectively reduces the looseness of the oblique head during injection molding and improves the product pass rate, especially in products with a thickness greater than 2mm, reducing the defect rate to 0%.
Smart Images
Figure CN222271135U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of molds, and in particular relates to a plastic mold inclined top anti-loosening structure. Background Art
[0002] During the plastic mold injection molding process, if the inclined top structure has poor fixity, the inclined top head will sink during the injection high pressure and rebound after the pressure holding, which will cause inclined top marks on the product appearance, affecting the product appearance and causing the defective rate of injection molded products to be as high as 60%. Especially for products with thicker wall thickness, they are more likely to loosen due to the high injection pressure. Therefore, it is urgent to improve the existing inclined top structure to reduce loosening during the injection molding process and improve the product qualification rate. Utility Model Content
[0003] Based on this, the utility model proposes a plastic mold inclined top anti-loosening structure.
[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is: a plastic mold inclined top anti-loosening structure, including an inclined top and an injection molded product, the inclined top includes an inclined top head and an inclined top rod, and the whole is in a 7 shape, the top surface of the inclined top head is a plane, and has a connecting end and an extended end connected to the inclined top rod, the extended end is provided with a step close to the inclined top rod side, a mold core is provided on the back of the injection molded product, and a cavity is provided at the bottom of the mold core to cooperate with the extended end of the inclined top head, and one end of the cavity is open and the other end is closed.
[0005] This solution sets a step at the protruding end of the inclined ejector head, and through cooperation with the mold core cavity, multi-level limiting can be achieved, achieving a better fixing effect.
[0006] Preferably, the protruding end of the inclined top is provided with three steps.
[0007] Further preferably, the step sides of the protruding end are chamfered.
[0008] Preferably, a protrusion is provided on the front end surface of the extended end of the inclined ejector head, and an opening matching with the protrusion is provided at the closed end of the cavity of the mold core, which can further fix the inclined ejector head to avoid rebound after pressure holding, and is particularly suitable for injection molded products with thicker meat thickness, such as when the thickness is greater than 2 mm.
[0009] Preferably, the cross-sectional area of the protrusion occupies at least one quarter of the cross-sectional area of the entire extended end to ensure the force magnitude.
[0010] Further preferably, the cross-section of the protrusion is a rectangle, and the width of the rectangle is along the direction of the height of the protruding end.
[0011] Further preferably, the rectangular cross-section of the protrusion has a length ≥5 mm and a width ≥2 mm.
[0012] Preferably, the injection molded product is an automobile door panel.
[0013] Compared with the prior art, the utility model has the following beneficial effects:
[0014] The utility model improves the structure of the inclined ejector head by firstly arranging a step and a multi-level limit at the protruding end to achieve the effect of avoiding rebound, and further arranging a protrusion at the front end surface of the protruding end and correspondingly arranging an opening on the mold core to cooperate with the protrusion to further achieve the effect of clamping and fixing, thereby reducing the loosening of the inclined ejector head during the injection molding process and improving the product qualification rate. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] Figure 1 This is an overall schematic diagram of the plastic mold tilt top anti-loosening structure of the utility model;
[0016] Figure 2 It is a schematic diagram of the back side of the plastic mold inclined top anti-loosening structure of the utility model;
[0017] Figure 3 It is a schematic diagram of the cavity structure of the plastic mold inclined top anti-loosening structure of the utility model;
[0018] Figure 4 The utility model is a schematic diagram of the inclined top structure of the plastic mold inclined top anti-loosening structure. DETAILED DESCRIPTION
[0019] In order to make the purpose, technical solutions and advantages of the invention more clear, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments.
[0020] Example 1
[0021] refer to Figure 1-4 A plastic mold inclined top anti-loosening structure includes an injection molded product 1 and an inclined top 2. The inclined top 2 includes an inclined top head 21 and an inclined top rod 22, and is in a 7-shape as a whole. The top surface of the inclined top head 21 is a plane, and has a connecting end connected to the inclined top rod 22 and an extended end 211. The extended end 211 is provided with a step 213 near the inclined top rod 22. A mold core 11 is provided on the back of the injection molded product 1, and a cavity 111 is provided on the mold core 11 to cooperate with the extended end 211 of the inclined top head. One end of the cavity 111 is open and the other end is closed.
[0022] By providing a step 213 at the protruding end 211 of the inclined ejector 21 and cooperating with the mold core cavity 111 , multi-level limiting can be achieved, thereby achieving a better fixing effect.
[0023] For better fixation, the step 213 has three levels, and the sides of the step 213 are chamfered.
[0024] Furthermore, since the injection molding pressure of thick-walled products is greater, in order to better fix and prevent the beveled plug 21 from rebounding, a protrusion 212 is provided on the front end surface of the extended end 211 of the beveled plug 21, and an opening 112 that cooperates with the protrusion 212 is provided at the closed end of the cavity 111 of the mold core, which can further fix the beveled plug and prevent rebound after pressure holding. Preferably, the cross-sectional area of the protrusion 212 accounts for at least one-fourth of the cross-sectional area of the entire extended end to ensure the force size.
[0025] Preferably, the cross section of the protrusion 212 is a rectangle, and the width of the rectangle is along the direction of the height of the protruding end.
[0026] Preferably, the rectangular cross-section of the protrusion 212 has a length ≥5 mm and a width ≥2 mm.
[0027] In a specific embodiment, the injection molded product 1 is an automobile door panel, but may also be other products.
[0028] In a specific application of the utility model, the injection molded product is a car door panel, and the use Figure 4 The oblique ejector structure is used in conjunction with the improvement of the mold core cavity. Before use, the product appearance is poor due to the rebound of the oblique ejector; after use, the injection molded product has a beautiful appearance and no marks caused by the rebound. Before the structure was improved, the defective rate of injection molded products was as high as 60%. After the improvement, the defective rate of injection molded products was reduced to 0%.
[0029] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.
[0030] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.
Claims
1. A plastic mold tilt top anti-loosening structure, characterized in that: It includes a slanted ejector and an injection molding product. The slanted ejector includes a slanted ejector head and a slanted ejector rod. The whole is in a 7-shape. The top surface of the slanted ejector head is a plane, and has a connecting end connected to the slanted ejector rod and an extended end. The extended end is provided with a step near the slanted ejector rod. A mold core is arranged on the back of the injection molded product, and a cavity matching with the extended end of the inclined ejector head is arranged on the mold core, wherein one end of the cavity is open and the other end is closed.
2. The anti-loosening structure of the plastic mold inclined top according to claim 1, characterized in that: The protruding end of the inclined top is provided with three steps.
3. The anti-loosening structure of the plastic mold inclined top according to claim 1, characterized in that: The side edges of the steps at the protruding ends are all chamfered.
4. The plastic mold tilt top anti-loosening structure according to any one of claims 1 to 3, characterized in that: A protrusion is provided on the front end surface of the extended end of the inclined top head, and an opening matched with the protrusion is provided on the closed end of the cavity of the mold core.
5. The plastic mold tilt top anti-loosening structure according to claim 4, characterized in that: The cross-sectional area of the projection occupies at least one quarter of the cross-sectional area of the entire extended end.
6. The plastic mold tilt top anti-loosening structure according to claim 5, characterized in that: The cross section of the protrusion is a rectangle, and the width of the rectangle is along the height direction of the protruding end.
7. The anti-loosening structure of the plastic mold inclined top according to claim 6, characterized in that: The rectangular cross-section of the protrusion has a length of ≥5mm and a width of ≥2mm.
8. The anti-loosening structure of the plastic mold inclined top according to claim 1, characterized in that: The injection molded product is an automobile door panel.