A sequential mold opening and closing mechanism with front mold spring block and rear mold shrinking

Abstract

The present invention relates to a mechanism for sequentially opening and closing a mold with a front mold spring block and a rear mold shrinking, comprising an A plate, a B plate and an opener and shutter assembly, wherein the B plates are respectively the first B plate and the second B plate, and the opener and shutter assemblies are respectively the first opener and the second opener and the shutter, wherein the first opener and the shutter comprise a first plunger seat and a first sliding block for limiting the downward movement of the first B plate, a first plunger for driving the second B plate to move up and down and releasing the movement restriction of the first B plate; the second opener and the shutter comprise a second plunger seat, a second plunger and a second sliding block for limiting the downward movement of the first B plate relative to the second B plate, and the second plunger is linked with the second B plate. The movable plate can be moved in two sections in the same moving direction, the mold can be opened in a certain order, and the product in the mold can be taken out; through the linkage of the two openers and the shutters, the structure of a single opener and the shutter is simple, easy to assemble, and convenient to use; the linkage between the two openers and the shutters can be carried out without stopping during the mold opening process, and the mold opening efficiency is high.

Description

Technical Field

[0001] The invention relates to the field of mold demoulding structures, and more specifically to a mold opening and closing mechanism in which a front mold spring block and a rear mold shrink in sequence. Background Art

[0002] A certain mechanism is used to separate the molds in a certain order and distance when they are opened, so that the mold opening action is completed in sequence. This mechanism is usually called an opener and closer. The figure shows a mold with a front mold spring block and a rear mold shrinking. It is necessary to demold the movable mold insert fixed on the second plate B before demolding the whole product. Otherwise, the product will move backward with the movable mold insert and demolding cannot be achieved. The patent document with authorization announcement number CN201720972U discloses an opener and closer, which realizes demolding after the bottom plate rises for a period of time. However, the B plate that cannot realize the movable mold opening can be divided into two movements, first demolding the movable mold insert, and then demolding the whole product. Summary of the invention

[0003] In order to overcome the problem in the prior art that the B plate can move separately twice when the movable mold is opened, the present invention provides a structure for demolding the entire mold after the fixed mold insert retreats a certain demolding distance.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a front mold spring block and rear mold shrinking sequential opening and closing mold mechanism, including an A plate, a B plate and an open and close assembly, the B plates are respectively the first B plate and the second B plate, the open and close assemblies are respectively the first open and close and the second open and close, the first open and close include a first plunger seat and a first sliding block for limiting the downward movement of the first B plate, a first plunger that is linked to the second B plate and releases the movement restriction of the first B plate; the second open and close include a second plunger seat, a second plunger and a second sliding block for limiting the downward movement of the first B plate relative to the second B plate, and the second plunger is linked to the second B plate.

[0005] When the mold is opened, the first B plate and the second B plate tend to move downward due to the elasticity of the mold opening. Since the first plunger seat and the first sliding block limit the downward movement of the first B plate, only the second B plate drives the first plunger and the second plunger to move downward. After the first plunger moves downward for a certain distance, the movement restriction of the first B plate is released, and the first B plate moves downward. Due to the restriction of the second sliding block and the second plunger, the first B plate cannot move downward relative to the second B plate. The first B plate and the second B plate can achieve segmented movement and maintain a fixed distance.

[0006] The first plug rod seat and the second plug rod seat are connected to the A plate, and the first sliding block and the second sliding block are connected to the first B plate through an elastic member; the first plug rod seat is provided with a first limiting mechanism to limit the movement of the first sliding block, and the upper end of the first plug rod is provided with a push block to make the first sliding block escape from the limit; the second plug rod is provided with a second limiting mechanism to limit the movement of the second sliding block. The first limiting mechanism is a limiting protrusion, and the limiting protrusion is in contact with the first sliding block; the second limiting mechanism is a limiting step provided at the upper end of the second plug rod.

[0007] After the mold completes injection molding, the mold is opened. The first B plate is connected to the first sliding block, and the first sliding block cannot move downward because it is held by the limiting protrusion, so only the second B plate moves downward. While the second B plate moves downward, it drives the first plug rod and the second plug rod to move downward. When the push block of the first plug rod moves to the position of the first sliding block, it pushes the first sliding block to compress the elastic part and disengage from the limiting protrusion. At the same time, the limiting step of the second plug rod resists the second sliding block. After the first sliding block is separated from the limiting protrusion, the first B plate moves downward, and the second sliding block connected to the first B plate is held by the limiting step, so the distance between the first B plate and the second B plate remains unchanged, and the movable mold insert on the second B plate does not contact the product on the first B plate, thereby achieving demolding.

[0008] Preferably, the upper end surface of the first sliding block is provided with a first inclined surface, the lower end surface of the push block is provided with a thrust inclined surface, and the lower end surface of the first insertion rod seat on the side close to the mold surface is provided with a first inclined surface. The thrust inclined surface of the push block contacts the inclined surface of the first sliding block, pushing the first sliding block inward and compressing the spring. When the first sliding block moves upward to reset, it contacts the inclined surface of the first insertion rod seat, and the inclined surface of the first insertion rod seat compresses the first sliding block, causing the first sliding block to move inward, so that the first sliding block can return to the top of the limiting protrusion.

[0009] Preferably, the distance between the limiting step and the second sliding block is shorter than the distance between the first sliding block and the pushing block. When the pushing block moves downward to the position of the first sliding block, the limiting step is already below the second sliding block. When the first B plate moves downward, the second B plate can also move downward relative to the first B plate, thereby reducing the mold opening distance of the second B plate during the first mold opening, further reducing the mold opening time, but at the same time, during the second mold opening, it can ensure that the distance between the A plate and the first B plate is sufficient for the product to be demolded.

[0010] Preferably, the first B plate is provided with a mounting groove, and the first sliding block and the second sliding block are both placed in the mounting groove. The first sliding block and the second sliding block are arranged in the mounting groove, which can limit the movement of the sliding block in other directions and prevent the sliding block from moving upward or downward out of the limit.

[0011] Preferably, the first plug-in rod seat and the second plug-in rod seat are connected to the A plate via a latch, and the first plug-in rod and the second plug-in rod are connected to the second B plate via a latch. The plug-in rod connection facilitates replacement and maintenance of the plug-in rod seat and the plug-in rod.

[0012] Preferably, the limiting protrusion is an insert on the first rod seat. The limiting protrusion abuts against the first sliding block, and the friction between the two is large, which is easy to wear. When the limiting protrusion is greatly worn, the limiting ability decreases, and it needs to be replaced. The limiting protrusion is made into an insert to facilitate the replacement of the limiting protrusion.

[0013] Preferably, the upper end surface of the second sliding block is provided with a second inclined surface, and the second insertion rod seat is provided with a second inclined surface abutting against the second inclined surface of the second sliding block. When the mold is closed, the second sliding block can be compressed backward, the limiting step of the second insertion rod is disengaged from the second sliding block, and the second insertion rod can be smoothly reset.

[0014] Preferably, a gap is provided between the limiting protrusion and the first sliding block. Since the front mold spring block and the spring on the A plate have a strong elastic force to push the first B plate, when the mold is opened, the first B plate can first drop a small gap distance to release part of the elastic force to achieve a buffering effect.

[0015] Compared with the prior art, the advantageous effects are: the movable platen can be moved in two sections in the same moving direction, the mold can be opened in a certain order, and the product in the mold can be taken out; through the linkage of the two openers and closes, the structure of a single opener and closes is simple, easy to assemble and easy to use; the linkage between the two openers and closes can ensure that the mold opening process does not stop, and the mold opening efficiency is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the mold structure of the front mold elastic block and the rear mold shrinkage of the present invention;

[0017] Figure 2 It is a schematic diagram of the installation structure of the switch assembly of the present invention;

[0018] Figure 3 yes Figure 2 A partial enlarged view of position A;

[0019] Figure 4 yes Figure 2 A local enlarged view of position B;

[0020] Figure 5 is a schematic diagram of the downward movement of the first shutter of the present invention;

[0021] Figure 6 It is a schematic diagram of the downward movement of the second shutter of the present invention.

[0022] Among them: 1. A plate; 101. front mold spring block; 102. spring member; 2. first B plate; 3. second B plate; 301. movable mold insert; 4. first shutter; 401. first plug rod seat; 4011. first inclined surface; 402. first plug rod; 403. first sliding block; 4031. first inclined surface; 404. limiting protrusion; 405. push block; 406. elastic member; 5. second shutter; 501. second plug rod seat; 5011. second inclined surface; 502. second plug rod; 503. second sliding block; 5031. second inclined surface; 504. limiting step. DETAILED DESCRIPTION

[0023] The drawings are only for illustrative purposes and cannot be construed as limiting the present invention. To better illustrate the present embodiment, some parts of the drawings may be omitted, enlarged, or reduced, and do not represent the size of the actual product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted in the drawings. The positional relationships described in the drawings are only for illustrative purposes and cannot be construed as limiting the present invention.

[0024] The same or similar numbers in the drawings of the embodiments of the present invention correspond to the same or similar parts; in the description of the present invention, it should be understood that if the terms "upper", "lower", "left", "right", "long", "short" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the drawings are only used for illustrative purposes and cannot be understood as limitations on this patent. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] The technical solution of the present invention is further described in detail below through specific embodiments and in conjunction with the accompanying drawings:

[0026] Example 1

[0027] like Figure 1 As shown, a front mold spring block and rear mold shrinking sequential mold opening and closing mechanism, wherein the mold part includes A plate 1, first B plate 2 and second B plate 3. A front mold spring block 101 and a spring member 102 are arranged in the A plate 1. After the mold is opened, the elastic force generated by the front mold spring block 101 and the spring member 102 will pop out the first B plate 2 and the second B plate 3. A movable mold insert 301 is arranged on the second B plate 3, and the movable mold insert 301 and the front mold spring block 101 form a mold cavity of the product.

[0028] like Figure 2As shown, a front mold spring block and rear mold shrinking sequential mold opening and closing mechanism also includes an opener and shutter assembly arranged outside the mold, and the opener and shutter assembly are respectively a first opener and shutter 4 and a second opener and shutter 5.

[0029] like Figure 3 As shown, the first shutter includes a first plug seat 401, a first plug rod 402 and a first sliding block 403. The first plug seat 403 is provided with a limiting protrusion 404 for limiting the movement of the first sliding block, and the limiting protrusion 404 is installed on the first plug seat 403 in the form of an insert. The upper end of the first plug rod 402 is provided with a push block 405 for making the first sliding block 403 disengage from the limit. The upper end surface of the first sliding block 403 is provided with a first inclined surface 4031, the lower end surface of the push block 405 is provided with a thrust inclined surface, and the lower end surface of the first plug seat 401 close to the mold surface is provided with a first inclined surface 4011. The first B plate 2 is provided with a mounting groove, and the first sliding block 403 is installed in the mounting groove through an elastic member 405 (preferably a spring). The first plug seat 401 is connected to the A plate 1 through a latch, and the first plug rod 402 is connected to the second B plate 3 through a latch.

[0030] like Figure 4 As shown, the second shutter 5 includes a second plunger seat 501, a second plunger 502 and a second sliding block 503. The second plunger 502 has a limiting step 504 for limiting the movement of the second sliding block 503. The upper end surface of the second sliding block 503 is provided with a second inclined surface 5031, and the second plunger seat 501 is provided with a second inclined surface 5011 abutting against the second inclined surface of the second sliding block 503. The second sliding block 503 is also installed in the installation groove of the first B plate 2 through a spring. The second plunger seat 501 is connected to the A plate 1 through a latch, and the second plunger 502 is connected to the second B plate 3 through a latch.

[0031] The distance between the limiting step 504 and the second sliding block 503 is shorter than the distance between the first sliding block 403 and the pushing block 405 .

[0032] The working process or working principle of the present invention is as follows: After the mold is finished with injection molding, the mold is opened. The first B plate 2 is connected to the first sliding block 403, and the first sliding block 403 cannot move downward because it is held by the limiting protrusion 404, so only the second B plate 3 moves downward. When the second B plate 3 moves downward, it drives the first insertion rod 402 and the second insertion rod 502 to move downward. Figure 5 As shown, when the push block 405 of the first insertion rod 402 moves to the position of the first sliding block 403, the thrust inclined surface of the push block 405 contacts the inclined surface of the first sliding block 403, pushing the first sliding block 403 inward and compressing the spring, so that the first sliding block 403 is separated from the limiting protrusion 404. Figure 6As shown, the limiting step 504 is located below the second sliding block 503 , and the second sliding block 503 moves downward, breaking away from the restriction of the inclined surface of the second rod seat 501 , and the second sliding block extends into the groove of the limiting step 504 .

[0033] After the first sliding block 403 disengages from the limiting protrusion 404, the first B plate 2 and the second B plate 3 move downward. When the second B plate moves downward for a certain distance relative to the first B plate, the second sliding block 503 is stopped by the limiting step 504. The distance between the first B plate 2 and the second B plate 3 remains unchanged. The movable mold insert on the second B plate 3 does not contact the product on the first B plate 2. At the same time, there is enough space between the A plate 1 and the first B plate 2 to allow the product to be demolded.

[0034] When the mold is closed, the first B plate 2 moves upward, the second sliding block 503 contacts the inclined surface of the second insertion rod seat 501, compresses the spring and moves inward, and does not abut against the limiting step 504. The first sliding block 403 contacts the inclined surface of the first insertion rod seat 401, compresses the spring and moves inward, returning to the initial position. The second B plate 3 moves upward, the insertion rod moves upward, the push block 405 and the limiting step 504 move upward, and because the limiting step 504 does not abut against the second sliding block 503, the second insertion rod 502 is reset.

[0035] The beneficial effects of the present invention are as follows: the movable platen can be moved in two sections in the same moving direction, the mold can be opened in a certain order, and the product in the mold can be taken out; through the linkage of the two openers and shutters, the structure of a single opener and shutter is simple, easy to assemble and easy to use; the linkage between the two openers and shutters can ensure that the mold opening process does not stop, and the mold opening efficiency is high.

[0036] Example 2

[0037] This embodiment is similar to the embodiment 1, except that a gap of 2-3 mm is provided between the limiting protrusion 404 and the first sliding block 403. In this embodiment, a gap of 2 mm is provided between the limiting protrusion 404 and the first sliding block 403.

[0038] The working principle of this embodiment is as follows: since the front mold spring block 101 and the spring 102 on the A plate 1 have a strong elastic force to push the first B plate 2, when the mold is opened, the first B plate 2 first drops 2mm to release part of the elastic force to achieve a buffering effect.

[0039] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A front mold spring block and rear mold shrinking sequential mold opening and closing mechanism, comprising an A plate (1), a B plate and an opening and closing device assembly, wherein the B plates are respectively a first B plate (2) and a second B plate (3), characterized in that: The shutter assembly comprises a first shutter (4) and a second shutter (5), wherein the first shutter (4) comprises a first plunger seat (401) and a first sliding block (403) for limiting the downward movement of the first B plate (2), and a first plunger (402) which is linked with the second B plate (3) and releases the movement restriction of the first B plate (2); the second shutter (5) comprises a second plunger seat (501), a second plunger (502) and a second sliding block (503) for limiting the downward movement of the first B plate (2) relative to the second B plate (3), and the second plunger (502) is linked with the second B plate (3); The first insertion rod seat (401) and the second insertion rod seat (501) are connected to the A plate (1), and the first sliding block (403) and the second sliding block (503) are connected to the first B plate (2) via an elastic member; the first insertion rod seat (401) is provided with a first limiting mechanism for limiting the movement of the first sliding block (403), and the upper end of the first insertion rod (402) is provided with a pushing block (405) for making the first sliding block (403) escape from the limiting position; the second insertion rod (502) is provided with a second limiting mechanism for limiting the movement of the second sliding block (503); The first limiting mechanism is a limiting protrusion (404), and the limiting protrusion (404) is in abutment with the first sliding block (403); the second limiting mechanism is a limiting step (504) arranged at the distal end of the second insertion rod (502); The upper end surface of the first sliding block (403) is provided with a first inclined surface (4031), the lower end surface of the push block (405) is provided with a thrust inclined surface, and the lower end surface of the first insertion rod seat (401) on a side close to the mold surface is provided with an inclined surface (4011); The distance between the limiting step (504) and the second sliding block (503) is shorter than the distance between the first sliding block (403) and the pushing block (405); The first B plate (2) is provided with a mounting groove, and the first sliding block (403) and the second sliding block (503) are both placed in the mounting groove.

2. The sequential mold opening and closing mechanism of the front mold elastic block and the rear mold shrinking according to claim 1 is characterized in that: The first plug-in rod seat (401) and the second plug-in rod seat (501) are connected to the A plate (1) via a latch, and the first plug-in rod (402) and the second plug-in rod (502) are connected to the second B plate (3) via a latch.

3. The sequential mold opening and closing mechanism of the front mold spring block and the rear mold shrinking according to claim 1 is characterized in that: The upper end surface of the second sliding block (503) is provided with a second inclined surface (5031), and the second rod insertion seat (501) is provided with an inclined surface (5011) abutting against the second inclined surface of the second sliding block (503).

4. A front mold elastic block and rear mold shrinking sequential mold opening and closing mechanism according to any one of claims 1-3, characterized in that: A gap is provided between the limiting protrusion (404) and the first sliding block (403).

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