Injection mold capable of being opened and closed in sequence

Abstract

The utility model discloses a sequential mould opening and closing injection mould, which relates to the field of injection moulding, and comprises an upper mould plate, a lower mould plate, a sequential mould opening structure and a buckling machine structure, the sequential mould opening structure is arranged at two ends of the lower mould plate, the buckling machine structure comprises a connecting rod, a first buckling piece and a second buckling piece, the lower mould plate is provided with a first through hole, and the upper mould plate is provided with a second through hole. The lower end of the connecting rod is arranged in the second through hole in an up-down sliding mode, the first fastener is detachably arranged at the upper end of the connecting rod and is in interference fit with the second through hole, a lock catch structure is arranged at the lower end of the connecting rod, and the second fastener is detachably arranged at the lower end of the lock catch structure and is detachably arranged in the first through hole. And under the action of the buckling machine structure, the upper template can slide up and down. It is guaranteed that the upper mold plate and the lower mold plate are firstly closed, the core pulling mechanism is then closed, and mold collision and mold pressing are prevented.

Description

Technical Field

[0001] The utility model relates to the field of injection molding, in particular to an injection mold with sequential opening and closing molds. Background Art

[0002] Common injection molds generally include an upper fixing plate, a stripping plate, an upper template, an upper mold core, a lower template, a lower mold core, an upper ejector plate, a lower ejector plate, an ejector pin and other accessory structures.

[0003] For some complex injection molded parts (such as Figure 6 For the injection molded parts shown in the figure, it is necessary to use a core-pulling structure on the upper mold plate to process the complex curved surface on the injection molded parts. When closing the mold, the upper and lower mold plates need to be closed first to prevent mold collision and mold compression; when opening the mold, the upper and lower mold plates and the core-pulling structure need to be opened first, and then the injection molded parts can be ejected. Therefore, the mold opening sequence needs to be strictly controlled. However, the mold opening sequence of traditional injection molds cannot be effectively guaranteed, and it is very easy for the mold opening actions to interfere with each other, resulting in the phenomenon of pulling or damaging the surface of the injection molded parts or even damaging the injection molded parts.

[0004] Therefore, an injection mold with sequential mold opening and closing is provided to solve the problem of action sequence when the mold is opened and ensure that the upper mold plate and the lower mold plate are opened first. Utility Model Content

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a sequential opening and closing injection mold, comprising an upper template, a lower template, a sequential mold opening structure and a latch structure, the sequential mold opening structure is arranged at both ends of the lower template, the latch structure comprises a connecting rod, a first fastener and a second fastener, the lower template is provided with a first through hole, the upper template is provided with a second through hole, the lower end of the connecting rod is slidably arranged in the second through hole, the first fastener is detachably arranged at the upper end of the connecting rod, the first fastener is interference fit with the second through hole, the lower end of the connecting rod is provided with a locking structure, the second fastener is detachably arranged at the lower end of the locking structure, and the second fastener is detachably arranged in the first through hole.

[0006] Preferably, the sequential mold opening structure includes a first limiting rod and a second limiting rod, a transverse groove is provided on the bottom surface of the lower mold, and a longitudinal groove is provided on the lower mold. The longitudinal groove is vertically connected to one end of the transverse groove. The upper end of the first limiting rod is arranged on the upper mold, and the first limiting rod passes through the longitudinal groove. The second limiting rod can be rotatably arranged in the transverse groove, and the longitudinal groove is arranged on the rotation trajectory of the second limiting rod.

[0007] Preferably, the second through hole includes an upper circular hole and a lower circular hole connected in sequence from top to bottom, the depth of the upper circular hole is less than the length of the connecting rod, the depth of the lower circular hole is equal to the mold opening stroke, the diameters of the locking structure and the second fastener are both smaller than the diameter of the lower circular hole, and the diameter of the locking structure is larger than the diameter of the upper circular hole.

[0008] Preferably, the second fastener is a cylinder, the second fastener is a nylon rubber plug, and the second fastener is detachably connected to the connecting rod by screws.

[0009] Preferably, the first fastener is a cylinder, the first fastener is a metal block, and the first fastener is detachably connected to the connecting rod by screws.

[0010] Preferably, the second fastener is an elastic deformable body, the second fastener is interference fit with the first through hole, and the edge of the end surface of the second fastener close to the lower template is chamfered.

[0011] Preferably, the locking structure is a metal cylinder, and the locking structure and the connecting rod are integrally formed.

[0012] Preferably, it also includes an upper fixed plate, a guide pin and a compression spring, wherein the guide pin is arranged on the upper fixed plate, and the compression spring is sleeved on the guide pin; when the mold is closed, the upper and lower ends of the compression spring respectively contact the upper fixed plate and the upper mold plate.

[0013] Preferably, a venting groove is provided on the surface of the locking structure in contact with the second fastener, the venting groove is arranged around the second fastener, and both ends of the venting groove are connected to the outer wall of the locking structure.

[0014] It also includes a core pulling mechanism, which includes a slider seat arranged on the upper template and a guide column fixed on the upper fixed plate, and a molding surface is provided at the lower end of the slider seat.

[0015] The working principle of the utility model is as follows: when closing the mold, the lower template moves close to the upper template, the ejector pin is reset, and the second limit rod is pressed. The second fastener is inserted into the first through hole of the lower template. At this time, the upper template contacts the lower template and closes the mold. Then the connecting rod and the lower template will continue to move a distance, at which time the upper template contacts the upper fixed plate and closes the mold, and the core pulling mechanism also completes the mold closing. When the connecting rod moves, the locking structure at the end of the connecting rod and the second fastener will move from the upper end of the lower circular hole to the lower end of the lower circular hole.

[0016] When opening the mold, the connecting rod and the lower mold plate will move synchronously for a distance. At this time, the upper mold plate and the upper fixed plate will be affected by the elastic force of the compression spring and then open the mold, and the core pulling mechanism and the core will also be separated. Then the lower mold plate will continue to move for a distance, and the second fastener will be disengaged from the first through hole. Then the lower mold plate will continue to move for a distance, and the upper mold plate and the lower mold plate will open the mold. When the connecting rod moves, the locking structure at the end of the connecting rod and the second fastener will move from the lower end of the lower circular hole to the upper end of the lower circular hole.

[0017] One end of the second limit rod is hingedly set on the lower mold plate, and the other end of the second limit rod is in contact with the upper ejector plate. When the mold is closed, the ejector pin is reset, the upper ejector plate is separated from the lower mold plate, and the second limit rod is in an inclined posture. When the second limit rod is in an inclined state, the second limit rod no longer blocks the longitudinal groove, and the first limit rod can pass through the longitudinal groove. The opposite is true when the mold is opened.

[0018] The beneficial effects of the utility model are as follows: under the action of the buckle structure, the upper template can slide up and down. The lower template first moves a distance to the position of the lower template to complete the mold closing of the lower template and the upper template, and the lower template pushes the upper template to move a distance to the preset position to complete the mold closing of the upper fixed plate and the upper template. Ensure that the upper template and the lower template are closed first, and the core pulling mechanism is closed later, to prevent mold collision and mold compression. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings further illustrate the present invention, but the embodiments in the accompanying drawings do not constitute any limitation to the present invention.

[0020] Figure 1 A schematic structural diagram of an injection mold for sequentially opening and closing molds provided in one embodiment of the utility model;

[0021] Figure 2 A cross-sectional view of an injection mold with sequential opening and closing provided in accordance with an embodiment of the utility model Figure 1 ;

[0022] Figure 3 A cross-sectional view of an injection mold with sequential opening and closing provided in accordance with an embodiment of the utility model Figure 2 ;

[0023] Figure 4 A schematic diagram of a latch mechanism according to an embodiment of the present invention;

[0024] Figure 5 for Figure 3 A partial enlarged view of the B area;

[0025] Figure 6 The utility model is a schematic structural diagram of an injection molded part of an injection mold with sequential opening and closing of the mold.

[0026] Figure numerals: 1: upper template; 2: lower template; 3: buckle structure; 31: connecting rod; 32: first fastener; 33: second fastener; 4: sequential mold opening structure; 41: first limiting rod; 42: second limiting rod; 5: upper fixing plate; 6: stripping plate; 7: guide pin; 8: compression spring. DETAILED DESCRIPTION

[0027] The specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementation described here is only used to illustrate and explain the present invention, and is not used to limit the present invention.

[0028] It should be noted that in the present invention, when an element is referred to as being "fixed on" or "set on" another element, unless otherwise stated, it may be directly on the other element or there may be a central element at the same time. The directional word "upper" used refers to the position of the upper fixing plate. The directional word "lower" used refers to the position of the upper ejector plate. "Inside and outside" refer to the inside and outside of a specific contour. "Far and near" refers to far and near relative to a certain component.

[0029] like Figure 1-Figure 5 As shown in, an injection mold with sequential opening and closing of molds is provided in one embodiment of the utility model, comprising an upper mold plate 1, a lower mold plate 2, a sequential mold opening structure 4 and a latch structure 3, wherein the sequential mold opening structure 4 is arranged at both ends of the lower mold plate 2, and the latch structure 3 comprises a connecting rod 31, a first fastener 32 and a second fastener 33, the lower mold plate 2 is provided with a first through hole, the upper mold plate 1 is provided with a second through hole, the lower end of the connecting rod 31 is slidably arranged in the second through hole up and down, the first fastener 32 is detachably arranged at the upper end of the connecting rod 31, the first fastener 32 is interference fit with the second through hole, the lower end of the connecting rod 31 is provided with a locking structure, the second fastener 33 is detachably arranged at the lower end of the locking structure, and the second fastener 33 is detachably arranged in the first through hole.

[0030] The sequential mold opening structure 4 includes a first limiting rod 41 and a second limiting rod 42. The bottom surface of the lower mold plate 2 is provided with a transverse groove, and the lower mold plate 2 is provided with a longitudinal groove. The longitudinal groove is vertically connected to one end of the transverse groove. The upper end of the first limiting rod 41 is arranged on the upper mold plate 1, and the first limiting rod 41 passes through the longitudinal groove. The second limiting rod 42 can be rotatably arranged in the transverse groove, and the longitudinal groove is arranged on the rotation trajectory of the second limiting rod 42.

[0031] The second through hole includes an upper circular hole and a lower circular hole connected in sequence from top to bottom, the depth of the upper circular hole is less than the length of the connecting rod 31, the depth of the lower circular hole is equal to the mold opening stroke, the diameters of the locking structure and the second fastener 33 are both smaller than the diameter of the lower circular hole, and the diameter of the locking structure is larger than the diameter of the upper circular hole.

[0032] The second fastener 33 is a cylinder, and is a nylon rubber plug. The second fastener 33 is detachably connected to the connecting rod 31 by screws.

[0033] The first fastener 32 is a cylinder, a metal block, and is detachably connected to the connecting rod 31 by screws.

[0034] The second fastener 33 is an elastic deformable body. The second fastener 33 is interference-fitted with the first through hole. The edge of the end surface of the second fastener 33 close to the lower template 2 is chamfered.

[0035] The lock structure is a metal cylinder, and the lock structure and the connecting rod 31 are integrally formed.

[0036] It also includes an upper fixed plate 5, a guide pin 7 and a compression spring 8. The guide pin 7 is arranged on the upper fixed plate 5, and the compression spring 8 is sleeved on the guide pin 7. When the mold is closed, the upper and lower ends of the compression spring 8 respectively contact the upper fixed plate 5 and the upper mold plate 1. In this embodiment, the stripper plate 6 and the upper fixed plate 5 are integrally formed.

[0037] An exhaust groove is formed on the surface of the locking structure in contact with the second fastener 33 . The exhaust groove is arranged around the second fastener 33 , and both ends of the exhaust groove are connected to the outer wall of the locking structure.

[0038] It also includes a core pulling mechanism, which includes a slider seat arranged on the upper template 1 and a guide column fixed on the upper fixed plate 5, and a molding surface is provided at the lower end of the slider seat.

[0039] In one embodiment, a stripping plate 6 is further included. The stripping plate 6 is fixedly disposed at the lower end of the upper fixed plate 5 , and the search guide pin 7 and the compression spring 8 both penetrate the stripping plate 6 .

[0040] The technical features of the above-mentioned embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the utility model, which should be considered as the scope of this specification.

Claims

1. An injection mold with sequential opening and closing, characterized in that: It includes an upper template, a lower template, a sequential mold opening structure and a latching structure, wherein the sequential mold opening structure is arranged at both ends of the lower template, and the latching structure includes a connecting rod, a first fastener and a second fastener, the lower template is provided with a first through hole, the upper template is provided with a second through hole, the lower end of the connecting rod is slidably arranged in the second through hole, the first fastener is detachably arranged at the upper end of the connecting rod, the first fastener is interference fit with the second through hole, the lower end of the connecting rod is provided with a locking structure, the second fastener is detachably arranged at the lower end of the locking structure, and the second fastener is detachably arranged in the first through hole.

2. The sequentially opening and closing injection mold according to claim 1, characterized in that: The sequential mold opening structure includes a first limiting rod and a second limiting rod. The bottom surface of the lower mold plate is provided with a transverse groove, and the lower mold plate is provided with a longitudinal groove. The longitudinal groove is vertically connected to one end of the transverse groove. The upper end of the first limiting rod is arranged on the upper mold plate, and the first limiting rod passes through the longitudinal groove. The second limiting rod can be rotatably arranged in the transverse groove, and the longitudinal groove is arranged on the rotation trajectory of the second limiting rod.

3. The sequentially opening and closing injection mold according to claim 1, characterized in that: The second through hole includes an upper circular hole and a lower circular hole connected in sequence from top to bottom, the depth of the upper circular hole is smaller than the length of the connecting rod, the diameters of the locking structure and the second fastener are both smaller than the diameter of the lower circular hole, and the diameter of the locking structure is larger than the diameter of the upper circular hole.

4. The sequentially opening and closing injection mold according to claim 1, characterized in that: The second fastener is a cylinder, and the second fastener is detachably connected to the connecting rod.

5. The sequentially opening and closing injection mold according to claim 1, characterized in that: The first fastener is a cylinder, and the first fastener is detachably connected to the connecting rod.

6. The sequentially opening and closing injection mold according to claim 4, characterized in that: The second fastener is an elastic deformable body, the second fastener is interference-fitted with the first through hole, and the edge of the end surface of the second fastener close to the lower template is chamfered.

7. The sequentially opening and closing injection mold according to claim 1, characterized in that: The lock structure is a metal cylinder, and the lock structure and the connecting rod are integrally formed.

8. The sequentially opening and closing injection mold according to claim 1, characterized in that: It also includes an upper fixing plate, a guide pin and a compression spring. The guide pin is arranged on the upper fixing plate, and the compression spring is sleeved on the guide pin.

9. The sequentially opening and closing injection mold according to claim 7, characterized in that: An exhaust groove is provided on the surface of the locking structure in contact with the second fastener. The exhaust groove is arranged around the second fastener, and both ends of the exhaust groove are connected to the outer wall of the locking structure.

10. The sequentially opening and closing injection mold according to claim 8, characterized in that: It also includes a core pulling mechanism, which includes a slider seat arranged on the upper template and a guide column fixed on the upper fixed plate, and a molding surface is provided at the lower end of the slider seat.

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