Seesaw mold opening insert retreating structure
By using a seesaw-shaped mold opening insert retraction structure, the problem of the nut insert not being fixed in position during injection molding is solved, achieving stable sealing of the thread, reducing the defect rate of plastic products and lowering costs.
Patent Information
- Application Number
- CN202520444947.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-14
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-03-14
AI Technical Summary
Existing technologies make it difficult to fix the position of the nut insert during injection molding, resulting in thread damage and a high defect rate in plastic products.
The mold adopts a seesaw-style mold opening insert retraction structure, including a fixed template, a moving template, a square iron, a base plate, a reset rod, a seesaw, insert pins, insert pin springs, and inclined guide pillars. The insert pins are pushed back by the insert pin springs, which causes the seesaw reset rod to float up. When the mold is closed, the slider slides into the cavity to achieve stable sealing of the nut insert.
It improves stability during the injection molding process, reduces the defect rate of plastic products, has a simple structure and lower cost, and is particularly suitable for structures where a single insert or insert pin needs to be retracted.
Smart Images
Figure CN223918526U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to a injection mold especially a seesaw mold opening insert retreat structure. BACKGROUND
[0002] Plastic injection mold is the tool of producing plastic products, and is applied very widely. Figure 1 As shown in a kind of plastic product 100 with nut insert 101, in injection molding, since the Z direction of nut insert 101 has no position fixed, when the injection pressure is from below to above, nut insert 101 will move upwards, leading to B position pouring glue, and since the mold needle opening A needs to seal glue, C angle guide cannot be done, sharp angle is easy to damage screw when demoulding, leading to too high bad rate of plastic product 100, unable to meet normal production. UTILITY MODEL CONTENTS
[0003] The utility model aims at providing a seesaw mold opening insert retreat structure with simple structure, lower cost and more stability.
[0004] To achieve the above-mentioned purpose, the technical solution of the utility model is as follows:
[0005] The utility model is a seesaw mold opening insert retreat structure, including fixed mold plate, movable mold plate, square iron, bottom plate, top plate, reset rod, seesaw, insert needle, insert needle spring;
[0006] The bottom surface of fixed mold plate and the top surface of movable mold plate are abutted together, movable mold plate is fixed on bottom plate by square iron, and top plate is installed between movable mold plate and bottom plate;The upper end of reset rod is inserted into fixed mold plate after passing through movable mold plate upwards, and the lower end of reset rod is abutted against the outer end of seesaw, the middle part of seesaw is hinged on top plate, the inner end of seesaw is abutted against the lower end of insert needle, the upper end of insert needle is inserted into cavity after passing through movable mold plate upwards, and insert needle spring is sleeved on insert needle, and the two ends of insert needle spring are abutted against the bottom surface of movable mold plate and insert needle respectively.
[0007] The middle part of insert needle has flange around the whole circumference, and the two ends of insert needle spring are abutted against the bottom surface of movable mold plate and the flange of insert needle respectively.
[0008] The top of insert needle is stepped column, so as to sleeve nut insert.
[0009] The utility model further includes sliding block and inclined guide pillar;The upper end of inclined guide pillar is fixed on fixed mold plate, and the lower part of inclined guide pillar is movably inserted into guide pillar hole of sliding block, sliding block is slidably connected on movable mold plate, the inner end of sliding block is inserted into cavity along transverse direction, and the bottom surface of inner end of sliding block is opposite to the upper end surface of insert needle inserted into cavity along longitudinal direction.
[0010] After adopting the above solution, since this utility model includes a fixed template, a moving template, a square iron, a base plate, a reset rod, a seesaw, an insert pin, and an insert pin spring, after the mold is opened, the insert pin spring pushes the insert pin to retract, and the insert pin drives the seesaw to make the reset rod float up. After the nut insert is installed on the top of the insert pin, the mold is closed, the slider slides into the cavity, and the reset rod drives the seesaw to make the nut insert and the bottom surface of the slider press against each other to achieve sealing, avoiding glue pouring during the injection molding process. Compared with the traditional B-plate spring-opening structure, this utility model has a simple structure, lower cost, and greater stability, and is particularly suitable for structures where a single insert or insert pin needs to retract first and second.
[0011] The present invention will be further described below with reference to the accompanying drawings and specific embodiments. Attached Figure Description
[0012] Figure 1 It is a cross-sectional view of a plastic product;
[0013] Figure 2 This is a cross-sectional view of the present invention;
[0014] Figure 3 This is a longitudinal sectional view of the present invention. Detailed Implementation
[0015] like Figure 2 , Figure 3 As shown, this utility model is a seesaw mold opening insert retraction structure, including a fixed template 1, a movable template 2, a square iron 3, a base plate 4, a slider 5, a reset rod 6, a seesaw 7, an insert pin 8, an insert pin spring 9, an inclined guide post 10, and a top plate 20.
[0016] The bottom surface of the fixed template 1 is in contact with the top surface of the movable template 2. The movable template 2 is fixed to the base plate 4 by square iron 3. The top plate 20 is installed between the movable template 2 and the base plate 4. The upper end of the inclined guide post 10 is fixed to the fixed template 1, and the lower part of the inclined guide post 10 is movably inserted into the guide post hole 51 of the slider 5. The slider 51 slides on the movable template 2, and the inner end of the slider 5 extends laterally into the cavity. The upper end of the reset rod 6 passes upward through the movable template 2. The bottom of the fixed template 1 is abutted against the bottom surface of the reset rod 6, the lower end of the reset rod 6 is abutted against the outer end of the seesaw 7, the middle part of the seesaw 7 is hinged to the top plate 20, the inner end of the seesaw 7 is abutted against the lower end of the insert pin 8, the upper end of the insert pin 8 passes upward through the moving template 2 and extends into the cavity, the bottom surface of the inner end of the slider 5 is opposite to the upper end surface of the insert pin 8 extending longitudinally into the cavity, the insert pin spring 9 is sleeved on the insert pin 8 and the two ends of the insert pin spring 9 are abutted against the bottom surface of the moving template 2 and the insert pin 8 respectively.
[0017] The insert pin 8 has a circumferential flange 81 at its center. The two ends of the insert pin spring 9 abut against the bottom surface of the moving template 2 and the flange 81 of the insert pin 8, respectively. The top of the insert pin 8 is a stepped post 82 to accommodate the nut insert 101 (e.g., ...).Figure 1 (As shown).
[0018] The working principle of this utility model:
[0019] After the mold is opened, the insert spring 9 pushes the insert pin 8 to retract it. The insert pin 8 drives the seesaw 7 to make the reset rod 6 float up. After the nut insert 101 is installed on the top of the insert pin 8, the mold is closed. The inclined guide post 10 drives the slider 5 to slide into the cavity. The reset rod 6 drives the seesaw 7 to make the nut insert 101 and the bottom surface of the slider 5 press against each other, thus sealing the glue and avoiding glue pouring during the injection molding process.
[0020] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be used to limit the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model should still fall within the scope of the patent of the present utility model.
Claims
1. A seesaw mold opening insert retraction structure characterized by: The die includes a fixed die plate, a movable die plate, a square iron, a bottom plate, a top plate, a reset rod, a seesaw, an insert pin, and an insert pin spring. The bottom surface of the fixed die plate and the top surface of the movable die plate are in close contact, the movable die plate is fixed on the bottom plate through the square iron, and the top plate is installed between the movable die plate and the bottom plate; the upper end of the reset rod penetrates through the movable die plate and is in abutment against the bottom surface of the fixed die plate, the lower end of the reset rod is in abutment against the outer end of the seesaw, the middle part of the seesaw is hinged on the top plate, the inner end of the seesaw is in abutment against the lower end of the insert pin, the upper end of the insert pin penetrates through the movable die plate and extends into the cavity, and the insert pin spring is sleeved on the insert pin and the two ends of the insert pin spring are in abutment against the bottom surface of the movable die plate and the insert pin respectively.
2. The rocker mold opening insert retraction structure of claim 1 wherein: The middle part of the insert pin has a flange around the whole circumference, and the two ends of the insert pin spring are in abutment against the bottom surface of the movable die plate and the flange of the insert pin respectively.
3. The rocker mold opening insert retraction structure of claim 1 wherein: The top part of the insert pin is a stepped column so as to sleeve the nut insert.
4. The rocker mold opening insert retraction structure of claim 1 wherein: The die further includes a sliding block and an inclined guide pillar; the upper end of the inclined guide pillar is fixed on the fixed die plate, the lower part of the inclined guide pillar is movably arranged in the guide pillar hole of the sliding block, the sliding block is slidably connected to the movable die plate, the inner end of the sliding block extends into the cavity in the transverse direction, and the bottom surface of the inner end of the sliding block is opposite to the upper end surface of the insert pin which extends into the cavity in the longitudinal direction.