Double-shot injection mold with fixed structure of sliding block

Abstract

The utility model relates to a bicolor injection mold with a fixed structure of an injection slider, which comprises a rear mold assembly and a front mold assembly, the rear mold assembly comprises a rear mold base plate, a rear mold cushion block, a rear mold plate rear mold core, a core-pulling wedge block and a core-pulling slider, the rear mold core is provided with a core-pulling guide groove, the core-pulling slider is provided with a guide pillar avoiding groove, and two sides of the guide pillar avoiding groove are elastically connected with retreat claws. The front mold assembly comprises a front mold base plate, a front mold plate, a front mold core and a mold closing wedge block, the mold closing wedge block is provided with a mold closing inclined face, the front mold plate is provided with a receding guide column, the side, away from the front mold core, of the receding guide column is provided with a receding driving face, and the side, facing the rear mold core, of the receding claw is provided with a receding plane. And one side, facing the rear mold core, of the retreating guide column is provided with a retreating extrusion surface. According to the utility model, the retreating plane is matched with the retreating driving surface, so that the retreating guide post is propped against the retreating claw to pull the core-pulling wedge block and the core-pulling sliding block to retract during mold opening, a power mechanism does not need to be added, the structure is simple, and the cost is low.

Description

Technical Field

[0001] The utility model relates to an injection mold, in particular to a two-color injection mold with a one-shot slider and a stationary structure. Background Art

[0002] Plastic parts are widely used due to their light weight, excellent mechanical properties, and ease of forming into complex shapes. Due to color requirements, two-shot injection molding has become widely used. Some two-shot injection molds require that the core-pulling slider not be retracted during the first shot. This requires limiting the slider's position and retracting it during the second shot. Existing solutions involve using a power element, such as a cylinder, to apply a retracting force to the slider, but this approach results in a complex structure and high costs. Utility Model Content

[0003] In view of the deficiencies in the prior art, the purpose of the present invention is to provide a two-color injection mold with a one-shot slider and a fixed structure.

[0004] The technical solution adopted by the utility model to solve its technical problems is: a two-color injection mold with a one-shot slider fixed structure, including a rear mold component and a front mold component, the rear mold component including a rear mold base plate, a rear mold pad arranged on the front side of the rear mold base plate, a rear template arranged on the front side of the rear template, a rear mold core arranged at the center of the front side of the rear template, a core-pulling wedge slidably connected to the rear template, and a core-pulling slider connected to the core-pulling wedge; the rear mold core is provided with a core-pulling guide groove for avoiding the core-pulling slider, the core-pulling slider is provided with a guide column avoidance groove, and retreat claws are elastically connected on both sides of the guide column avoidance groove, and the retreat claws are away from the rear mold core. A guiding inclined surface is provided on the side, and the front mold assembly includes a front mold base plate, a front mold plate arranged on the rear side of the front mold base plate, a front mold core arranged at the rear center of the front mold plate, and a mold closing wedge block arranged on the rear side of the front mold plate. The mold closing wedge block is provided with a mold closing inclined surface that cooperates with the core-pulling wedge block. A retreat guide pin is provided on the front mold plate, and the retreat guide pin extends from the front center of the front mold plate to the outer side of the rear side of the front mold plate. A retreat driving surface is provided on the side of the retreat guide pin facing away from the front mold core, and a retreat plane that cooperates with the retreat driving surface is provided on the side of the retreat claw facing the rear mold core, and a retreat extrusion surface is provided on the side of the retreat guide pin facing the rear mold core.

[0005] As a further improvement of this design, a stop groove is provided on the rear side of the core-pulling wedge block, and a stop spring pin is provided on the rear template, which extends into the stop groove when the core-pulling slider is in place.

[0006] As a further improvement of the present design, the cross section of the retaining groove is triangular, the extending direction of the retaining groove is perpendicular to the sliding direction of the core-pulling wedge, and the cross section of the top of the retaining pin is triangular.

[0007] As a further improvement of this design, the stop spring pin includes a spring pin seat detachably connected to the rear template, a spring pin body slidably connected to the spring pin seat, and a spring pin spring connecting the spring pin seat and the spring pin body.

[0008] As a further improvement of the present design, a core-pulling pressing block is provided on the rear template, and the rear side of the core-pulling pressing block is fitted with the front side of the core-pulling slider.

[0009] As a further improvement of the present design, a connecting T-shaped slot extending forward and backward is provided on the front side of the core-pulling wedge, and a T-shaped connecting portion cooperating with the connecting T-shaped slot is provided on the tail end of the core-pulling slider.

[0010] The beneficial effects of the utility model are as follows: the utility model provides a guiding inclined surface on the elastically connected retreat claw, which cooperates with the retreat extrusion surface on the retreat guide pin, so as to avoid interference and jamming between the retreat guide pin and the retreat claw when the mold is closed; the retreat plane cooperates with the retreat drive surface, so that when the mold is opened, the retreat guide pin stops the retreat claw and then pulls the core pulling wedge and the core pulling slider to retract, without adding a power mechanism, with a simple structure and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0012] Figure 1 It is a schematic diagram of the three-dimensional structure of the front mold of the present utility model.

[0013] Figure 2 It is a schematic diagram of the three-dimensional structure of the rear mold of the present utility model.

[0014] Figure 3 It is an overall cross-sectional schematic diagram of the present utility model.

[0015] Figure 4 It is a partial cross-sectional schematic diagram of the present utility model.

[0016] In the figure, 1. rear mold base plate, 2. rear mold pad, 3. core pulling wedge, 4. withdrawal claw, 5. rear mold plate, 6. guide column avoidance groove, 7. rear mold core, 8. core pulling slider, 9. connecting T-slot, 10. mold clamping pressure surface, 11. front mold base plate, 12. mold clamping wedge, 13. withdrawal guide column, 14. front mold core, 15. core pulling pressure block, 16. core pulling guide groove, 17. front mold plate, 18. mold clamping inclined surface, 19. withdrawal driving surface, 20. withdrawal plane, 21. stop spring pin, 210. spring pin seat, 211. spring pin body, 212. spring pin spring, 22. guide inclined surface, 23. stop groove, 24. withdrawal extrusion surface. DETAILED DESCRIPTION

[0017] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments. The exemplary embodiments and descriptions are only used to explain the present invention but are not intended to limit the present invention. Example

[0018] See Figure 1 and Figure 2 , This embodiment provides a two-color injection mold with a one-shot slider fixed structure, including a rear mold assembly and a front mold assembly, the rear mold assembly including a rear mold base plate 1, a rear mold pad 2 arranged on the front side of the rear mold base plate 1, a rear mold plate 5 arranged on the front side of the rear mold pad 2, a rear mold core 7 arranged at the center of the front side of the rear mold plate 5, a core pulling wedge 3 slidably connected to the rear mold plate 5, and a core pulling slider 8 connected to the core pulling wedge 3, the rear mold core 7 is provided with a core pulling guide groove 16 for avoiding the core pulling slider 8, the core pulling slider 8 is provided with a guide column avoidance groove 6, and retreat claws 4 are elastically connected on both sides of the guide column avoidance groove 6, and the retreat claw 4 is provided with a guiding inclined surface 22 on the side away from the rear mold core 7, the front mold assembly includes a front mold base. The plate 11, the front mold base plate 17 arranged on the rear side of the front mold base plate 11, the front mold core 14 arranged at the rear center of the front mold base plate 17, and the mold closing wedge 12 arranged on the rear side of the front mold base plate 17. The mold closing wedge 12 is provided with a mold closing inclined surface 18 that cooperates with the core pulling wedge 3. The front mold base plate 17 is provided with a retreat guide pin 13. The retreat guide pin 13 extends from the front center of the front mold base plate 17 to the rear outer side of the front mold base 17. The retreat guide pin 13 is provided with a retreat driving surface 19 on the side facing away from the front mold core 14. The retreat claw 4 is provided with a retreat plane 20 that cooperates with the retreat driving surface 19 on the side facing the rear mold core 7. The retreat guide pin 13 is provided with a retreat extrusion surface 24 on the side facing the rear mold core 7. The retreat driving surface 19 and the retreat plane 20 are parallel to the axis of the retreat guide pin 13. When the mold is closed, the mold closing inclined surface 18 is in contact with the mold closing pressure surface 10 on the core pulling wedge 3.

[0019] The guide slope 22 is provided on the retreat claw 4 connected elastically, and cooperates with the retreat extrusion surface 24 on the retreat guide column 13 to avoid interference and jamming between the retreat guide column 13 and the retreat claw 4 when the mold is closed; the retreat plane 20 cooperates with the retreat drive surface 19 so that when the mold is opened, the retreat guide column 13 stops the retreat claw 4 and then pulls the core-pulling wedge 3 and the core-pulling slider 8 to retract, without adding a power mechanism, with a simple structure and low cost.

[0020] See Figure 3 and Figure 4 A stop groove 23 is provided on the rear side of the core pulling wedge 3, and a stop spring pin 21 is provided on the rear template 5 to extend into the stop groove 23 when the core pulling slider 8 is in place.

[0021] See Figure 4The cross section of the retaining groove 23 is triangular, the extending direction of the retaining groove 23 is perpendicular to the sliding direction of the core-pulling wedge 3, and the cross section of the top of the retaining pin 21 is triangular.

[0022] See Figure 4 The stop spring pin 21 includes a spring pin seat 210 detachably connected to the rear template 5, a spring pin body 211 slidably connected to the spring pin seat 210, and a spring pin spring 212 connecting the spring pin seat 210 and the spring pin body 211.

[0023] See Figure 2 In order to prevent the core-pulling slider 8 from tilting and to facilitate the rapid replacement of the core-pulling slider 8 , a core-pulling pressing block 15 is provided on the rear template 5 , and the rear side of the core-pulling pressing block 15 is in contact with the front side of the core-pulling slider 8 .

[0024] See Figure 1 In order to facilitate the rapid installation of the core-pulling slider 8 and the core-pulling wedge 3 and compensate for the installation and manufacturing errors before and after the core-pulling slider 8, the front side of the core-pulling wedge 3 is provided with a connecting T-shaped groove 9 extending forward and backward, and the tail end of the core-pulling slider 8 is provided with a T-shaped connecting part that cooperates with the connecting T-shaped groove 9.

[0025] The one-shot mold corresponding to the two-shot mold of this solution is not provided with the retreat guide pin 13 .

[0026] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the description and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A two-color injection mold with a one-shot slider fixed structure, comprising a rear mold assembly and a front mold assembly, characterized in that: The rear mold assembly includes a rear mold base plate, a rear mold pad arranged on the front side of the rear mold base plate, a rear template arranged on the front side of the rear mold pad, a rear mold core arranged at the center of the front side of the rear template, a core-pulling wedge slidably connected to the rear template, and a core-pulling slider connected to the core-pulling wedge. The rear mold core is provided with a core-pulling guide groove for avoiding the core-pulling slider, and the core-pulling slider is provided with a guide column avoidance groove. Both sides of the guide column avoidance groove are elastically connected with retreat claws, and the retreat claw is provided with a guiding inclined surface on the side away from the rear mold core. The front mold assembly includes a front mold base plate, a rear mold base arranged on the The front template on the rear side of the front template substrate, the front mold core arranged at the center of the rear side of the front template, and the mold closing wedge block arranged on the rear side of the front template, the mold closing wedge block is provided with a mold closing inclined surface that cooperates with the core-pulling wedge block, and the front template is provided with a retreat guide pin, the retreat guide pin extends from the center of the front side of the front template to the outer side of the rear side of the front template, the retreat guide pin is provided with a retreat driving surface on the side away from the front mold core, the retreat claw is provided with a retreat plane that cooperates with the retreat driving surface on the side facing the rear mold core, and the retreat guide pin is provided with a retreat extrusion surface on the side facing the rear mold core.

2. The double-color injection mold with a one-shot slider and a fixed structure according to claim 1 is characterized in that: A stop groove is provided on the rear side of the core-pulling wedge block, and a stop spring pin is provided on the rear template, which extends into the stop groove when the core-pulling slider is in place.

3. The double-color injection mold with a one-shot slider and a fixed structure according to claim 2 is characterized in that: The cross section of the retaining groove is triangular, the extending direction of the retaining groove is perpendicular to the sliding direction of the core-pulling wedge, and the cross section of the top of the retaining pin is triangular.

4. The double-color injection mold with a one-shot slider and a fixed structure according to claim 3 is characterized in that: The stopping spring pin comprises a spring pin seat detachably connected to the rear template, a spring pin body slidably connected to the spring pin seat, and a spring pin spring connecting the spring pin seat and the spring pin body.

5. The double-color injection mold with a one-shot slider and a fixed structure according to claim 1 is characterized in that: The rear template is provided with a core-pulling pressing block, and the rear side of the core-pulling pressing block is in contact with the front side of the core-pulling slider.

6. The double-color injection mold with a one-shot slider and a fixed structure according to claim 5, characterized in that: A connecting T-shaped groove extending forward and backward is provided on the front side of the core-pulling wedge block, and a T-shaped connecting portion cooperating with the connecting T-shaped groove is provided on the tail end of the core-pulling slider.

Images