Die structure facilitating discharging

Abstract

The utility model provides a die structure convenient to discharge, which relates to the field of forming dies and comprises a base (10), a door-shaped support (20), a lifting mechanism (30), an upper die (40) and a lower die (50), the door-shaped support (20) is arranged on the end face of the base (10), the lifting mechanism (30) is arranged in the middle of a cross beam of the door-shaped support (20), and the upper die (40) is arranged at the output end of the lifting mechanism (30). The lower die (50) is arranged on the end face of the base (10) and located between the door-shaped supports (20). A groove (51) is formed in the middle of the end face of the lower die (50), a first top plate (510) is arranged in the groove (51) in a sliding mode, a male die (400) corresponding to the groove (51) is arranged at the bottom of the upper die (40), and a second top plate (41) is coaxially arranged in the middle of the male die (400). According to the mold structure, after a product is formed, demolding or unloading of the product can be facilitated, and the problems that demolding is difficult, the production efficiency is reduced, and the product is prone to being damaged due to manual direct unloading are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of forming molds, in particular to a mold structure which is convenient for unloading. Background Art

[0002] A mold is a tool used to make a molded object; the mold is composed of various parts that cooperate to form a molding cavity, which is conducive to the casting of the object. Chinese patent document CN214976979U discloses an adjustable precision mold positioning device, which facilitates the adjustment of the direction of the lower mold through the cooperation of a fixed plate, a rotating block and a limit block, and facilitates the ejection of the workpiece from the lower mold through the cooperation of a placement plate, a through slot, a strong spring, a connecting block and a push rod. However, since some products adhere tightly to the inner cavity of the mold during molding, and some molded products are thin (such as sheet metal parts of automobile bodies) and brittle (such as plastic shells of automobile parts), using a push rod with a small contact surface to eject the product from the mold can easily cause deformation, breakage and other problems of the molded product, increase product defective rate, increase production costs, and reduce production efficiency; at the same time, after the product molding process such as injection molding, it will not only adhere to the recessed inner cavity of the mold (specifically the lower mold inner cavity), but also easily adhere to the protruding part of the mold (specifically the upper mold protruding part). If it is not separated from the protruding part in time during demolding, it is very easy to cause the product to fall spontaneously. First, it is easy to cause product deformation, breakage and other problems. Second, it is easy to cause the product to damage the mold or the operator, and there is a potential safety hazard. Third, the efficiency of mold molding is reduced, unnecessary workload and production costs are increased. Utility Model Content

[0003] In view of the problems existing in the above-mentioned prior art, the purpose of the utility model is to provide a mold structure that is easy to unload. The mold structure can facilitate the demolding or unloading of the product after the product is formed, thereby avoiding the problems of reduced production efficiency, difficulty in demolding, easy damage to the product caused by direct manual unloading, and also avoiding the risks of deformation, damage, etc. caused by the product falling from the mold.

[0004] The purpose of the utility model is achieved through the following technical solutions:

[0005] A mold structure that is convenient for unloading, includes a base, a gate-shaped bracket, a lifting mechanism, an upper mold and a lower mold, the gate-shaped bracket is arranged on the end face of the base and the lifting mechanism is arranged in the middle of its (i.e., the gate-shaped bracket) cross beam, the upper mold is arranged on the output end of the lifting mechanism, the lower mold is arranged on the end face of the base and is located between the gate-shaped brackets; a groove is arranged in the middle of the end face of the lower mold and a first top plate is slidably arranged in the groove, the lower mold is located at the lower side of the groove and a sliding cavity is arranged and a movable block is slidably arranged in the sliding cavity, the bottom of the movable block is connected to the bottom surface of the sliding cavity through a first spring and the top surface of the movable block (i.e., the movable block) is connected to the bottom surface of the first top plate through a connecting rod, a spring groove is arranged on the end face of the outer circle of the groove and a movable pin is slidably arranged in the spring groove, the bottom surface of the movable pin is connected to the bottom surface of the spring groove through a second spring and the bottom surface of the movable pin is connected to the outer wall of the movable block through an "L"-shaped rod; a punch is arranged at the bottom of the upper mold corresponding to the groove, a top hole is arranged corresponding to the movable pin, and a second top plate is coaxially arranged in the middle of the punch.

[0006] Based on further optimization of the above solution, the lifting mechanism adopts a hydraulic lifting rod, which is controlled by a hydraulic cylinder fixedly arranged on the end surface of the gate-shaped bracket.

[0007] In order to avoid displacement of the upper mold during lifting and lowering, affecting positioning or final mold forming, based on further optimization of the above scheme, sliders are respectively arranged on the outer wall of the upper mold and corresponding to the two legs of the gate-shaped bracket, and vertical sliding grooves are opened on the opposite sides of the two legs of the gate-shaped bracket and corresponding to the sliders, and the sliders are stuck in the corresponding vertical sliding grooves and slidably connected.

[0008] Based on further optimization of the above scheme, the diameter of the "L"-shaped rod is smaller than the outer diameter of the second spring and smaller than the outer diameter of the movable pin, that is, the second spring is located in the outer ring of the "L"-shaped rod, thereby avoiding interference between the movement of the "L"-shaped rod and the expansion and contraction of the second spring; the lower mold opens an "L"-shaped slide groove corresponding to the "L"-shaped rod and the "L"-shaped slide groove is respectively connected to the spring groove and the slide cavity, and the transverse groove height of the "L"-shaped slide groove is not less than twice the diameter of the corresponding transverse rod of the "L"-shaped rod.

[0009] Based on further optimization of the above scheme, the connecting rods are distributed in a dot matrix on the end surface of the movable block, and the end of the connecting rod away from the movable block passes through the lower mold body at the connection between the sliding cavity and the groove and is connected to the bottom surface of the first top plate. The number of connecting rods is not less than five.

[0010] Based on further optimization of the above solution, the spring grooves are evenly distributed around the center axis of the lower mold.

[0011] Based on further optimization of the above scheme, a slot is provided on the bottom surface of the punch corresponding to the second top plate, the second top plate is clamped in the slot and slidably connected, a plurality of sliding rods are evenly arranged on the end surface of the second top plate and around its axis and the sliding rods are located on the outer ring of the lifting mechanism, the sliding rods pass through the upper mold and are slidably connected, an iron core clamping block is provided at the top end of the sliding rod and the sliding rod is located on the lower side of the iron core clamping block and a pin hole is provided passing through it (i.e., the sliding rod), and the second top plate is clamped in the slot by inserting the positioning pin into the pin hole.

[0012] Based on further optimization of the above solution, the length of the second top plate is smaller than the length of the first top plate.

[0013] The following are the technical effects of the utility model:

[0014] The present application realizes the opening and closing of the mold cavity composed of the punch and the groove by the lifting and lowering of the upper mold. At the same time, the upper mold is lowered to support the movable pin, and then the movable block is pushed down by the "L"-shaped rod. The first spring and the second spring are compressed, and the first top plate is pulled down to the bottom surface of the groove by the movable block and the connecting rod, so that the product can be formed. After the product is formed, the upper mold moves up, and the movable pin and the movable block move up due to the release of the elastic force of the second spring and the first spring, and then the first top plate is pushed up to realize the ejection of the molded product from the die; the first top surface is used to eject the product, firstly, to effectively avoid the increase in labor costs, product deformation or damage caused by manual unloading, and secondly, the top plate has a uniform force distribution on the whole product, which effectively avoids the mechanism of stress concentration such as the ejector pin from acting on the product, causing local deformation or damage to the product. In addition, through the setting of the second top plate, during the upward movement of the upper mold, the gravity is used to avoid the product from adhering to the punch surface of the upper mold, and then the product is prevented from falling with the movement of the upper mold, ensuring the effective separation of the product from the punch and the groove.

[0015] The mold structure of the present application is convenient to operate and use. First, it avoids the risk of the product adhering to the surface of the upper mold punch and falling off. Second, it ensures that the product is located in the groove of the lower mold and is partially ejected, thereby facilitating subsequent manual unloading, saving unloading time, improving product molding efficiency, and reducing the unqualified rate of molded products. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the mold structure in an embodiment of the utility model.

[0017] Figure 2 This is a usage status diagram of the mold structure in the embodiment of the utility model.

[0018] Figure 3 This is a schematic diagram of the mold structure in another embodiment of the utility model.

[0019] Among them, 10, base; 20, door-shaped bracket; 21, vertical slide groove; 30, lifting mechanism; 40, upper mold; 400, punch; 41, second top plate; 42, slider; 43, slide rod; 431, core block; 432, positioning pin; 44, top hole; 45, annular handle; 50, lower mold; 51, groove; 510, first top plate; 52, slide cavity; 521, movable block; 522, first spring; 523, connecting rod; 53, spring groove; 531, movable pin; 532, second spring; 54, "L"-shaped slide groove; 540, "L"-shaped rod. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Embodiment 1:

[0022] See below Figure 1 As shown: a mold structure that is easy to unload, including a base 10, a gate-shaped bracket 20, a lifting mechanism 30, an upper mold 40 and a lower mold 50. The gate-shaped bracket 20 is arranged on the end face of the base 10 and the lifting mechanism 30 is arranged in the middle of the cross beam thereof (i.e., the gate-shaped bracket 20). The lifting mechanism 30 adopts a hydraulic lifting rod, which is controlled by a hydraulic cylinder fixedly arranged on the end face of the gate-shaped bracket 20 (the hydraulic cylinder adopts a common structure in the field, which is not specifically marked in the drawings of this application. The structure and model thereof can be selected by technicians in this field according to actual conditions, and this embodiment does not make too many restrictions).

[0023] The upper mold 40 is arranged at the output end of the lifting mechanism 30. The outer wall of the upper mold 40 and the two legs of the gate-shaped bracket 20 are respectively provided with sliders 42. The side surfaces of the two legs of the gate-shaped bracket 20 are opposite to each other and are provided with vertical slide grooves 21 corresponding to the sliders 42. The sliders 42 are stuck in the corresponding vertical slide grooves 21 and are slidably connected (see Figure 1 The lower mold 50 is arranged on the end surface of the base 10 and is located between the door-shaped brackets 20 (see Figure 1 As shown); a groove 51 is provided in the middle of the end surface of the lower mold 50, and a first top plate 510 is slidably arranged in the groove 51 (that is, the outer ring of the first top surface 510 is sealed and slidably connected with the inner wall of the groove 51), the lower mold 50 is located at the lower side of the groove 51 to provide a sliding cavity 52, and a movable block 521 is slidably arranged in the sliding cavity 52, and the bottom of the movable block 521 is connected to the bottom surface of the sliding cavity 52 through a first spring 522 (the number of the first springs 522 is set according to the weight of the movable block 521 that needs to be supported, see Figure 1As shown, in this embodiment, the first spring 522 is provided with two pieces) and its (i.e., the movable block 521) top surface is connected to the bottom surface of the first top plate 510 through a connecting rod 523, and the connecting rods 523 are distributed in a dot matrix on the end surface of the movable block 521, and the end of the connecting rod 523 away from the movable block 521 passes through the lower mold 50 body at the connection between the sliding cavity 52 and the groove 51 and is connected to the bottom surface of the first top plate 523, and the number of connecting rods 523 is not less than five (generally 5 to 9 pieces are used). The end surface of the lower mold 50 located on the outer circle of the groove 51 is provided with a spring groove 53, and a movable pin 531 is slidably arranged in the spring groove 53, and the spring grooves 53 are evenly distributed around the central axis of the lower mold 50 (in this embodiment, the number of spring grooves 53 is 3 to 6, preferably 3), and the bottom surface of the movable pin 531 is connected to the bottom surface of the spring groove 53 through the second spring 532, and the bottom surface of the movable pin 531 is connected to the (corresponding) outer wall of the movable block 521 through an "L"-shaped rod 540 (see Figure 1 The second spring 532 is located at the outer ring of the "L"-shaped rod 540, thereby avoiding interference between the movement of the "L"-shaped rod 540 and the expansion and contraction of the second spring 532; the lower mold 50 is provided with an "L"-shaped slide groove 54 corresponding to the "L"-shaped rod 540, and the "L"-shaped slide groove 54 is respectively connected with the spring groove 53 and the slide cavity 52, the transverse groove height of the "L"-shaped slide groove 54 is not less than twice the transverse rod diameter of the corresponding "L"-shaped rod 540 (thereby facilitating the upward and downward sliding of the "L"-shaped rod 540), and the vertical rod outer wall of the "L"-shaped rod 540 is slidably connected with the vertical groove inner wall of the "L"-shaped slide groove 54 (that is, the vertical groove width of the "L"-shaped slide groove 54 is less than the spring groove 53 width).

[0024] A punch 400 is provided at the bottom of the upper mold 40 corresponding to the groove 51, a top hole 44 is provided corresponding to the movable pin 531, and a second top plate 41 is coaxially provided in the middle of the punch 400. Specifically, a slot is provided at the bottom surface of the punch 400 corresponding to the second top plate 41, the second top plate 41 is stuck in the slot and slidably connected (that is, the outer wall of the second top plate 41 is slidably connected to the inner wall of the slot), and a plurality of slide bars 43 are evenly provided on the end surface of the second top plate 41 and around its central axis (the number of slide bars 43 is set according to actual conditions, generally 2 to 5), and the slide bars 43 are located at the outer ring of the lifting mechanism 30 (refer to Figure 1 As shown in the figure, the slide bar 43 penetrates the upper mold 40 and is slidably connected (that is, the upper mold 40 has a through hole corresponding to the slide bar 43, and the outer wall of the slide bar 43 is slidably connected to the inner wall of the through hole), the top end of the slide bar 43 is provided with an iron core block 431, and the slide bar 43 is located at the lower side of the iron core block 431 and has a pin hole penetrating it (that is, the slide bar), and the second top plate 41 is clamped in the clamping groove by inserting the positioning pin 432 into the pin hole (refer to Figure 1As shown, the positioning pin 432 is located on the upper side of the end surface of the upper mold 40 to realize the hard limit of the slide bar 43 and the second top plate 41, and the second top plate 41 is sealed and connected in the slot). The length of the second top plate 41 is less than the length of the first top plate 510 (refer to Figure 1 As shown, the length of the second top plate 41 is less than the length of the punch, and the length of the first top plate 510 is consistent with the length of the groove 51).

[0025] Embodiment 2:

[0026] As a further optimization of the solution of the utility model, on the basis of the solution of Example 1, the upper mold 40 is provided with a conduit vertically passing through it, the conduit is located in the outer circle of the card slot and the number of the conduits is not less than two, so as to introduce product raw materials and realize injection molding; the upper end of the conduit (i.e., the end away from the lower mold 50) is connected to the external raw material supply device through a hose (the raw material supply device can adopt the common structure and model in the field, and this embodiment does not make specific limitations, and technical personnel in this field can obtain it according to needs without overcoming any technical difficulties).

[0027] Working principle:

[0028] The initial state of the entire mold structure is as follows Figure 1 As shown, when in use, first start the lifting mechanism 30 to move the upper mold 40 downward. During the downward movement of the upper mold 40, the top end of the movable pin 531 gradually pushes into the top hole 44 and contacts the top surface of the top hole 44. As the upper mold 40 continues to move downward, the upper mold 40 drives the movable pin 531 to move downward, and drives the movable block 521 to move downward through the movable pin 531 and the "L"-shaped rod. The first spring 522 and the second spring 532 are compressed, and the movable block 521 pulls the first top plate 510 downward through the connecting rod 523 until the bottom surface of the upper mold 40 located at the outer ring of the punch 400 contacts the top surface of the lower mold 50 located at the outer ring of the groove 51, and the lifting mechanism 30 is stopped. At this time, the bottom surface of the punch 400, the end surface of the first top plate 510 and the side wall of the groove 51 form a molding cavity (see Figure 2 As shown). Then, the product injection liquid is injected through the conduit for injection molding; after injection molding, the product is cooled for a period of time, and then the positioning pins 532 of each slide rod 43 are pulled out in turn, and then the lifting mechanism 30 is started to move upward, and the lifting mechanism 30 drives the upper mold 40 to move upward. At this time, due to the action of the core block 431 and the gravity of the second top plate 41, the second top plate 41 is pushed out of the slot, thereby preventing the molded product from adhering to the upper mold 40; at the same time, as the lifting mechanism 30 moves upward, the first spring 522 and the second spring 531 are reset, thereby pushing the first top plate 510 upward, and the molded product is pushed out of the groove 51 by a distance at one end (that is, the molded product is demolded relative to the groove 51), thereby facilitating the unloading of the molded product.

[0029] Embodiment 3:

[0030] As a further optimization of the solution of the utility model, on the basis of the solution of embodiment 1 or embodiment 2, in order to facilitate the smooth insertion of the second top plate 41 into the card slot and the re-insertion of the positioning pin 432, so as to facilitate the next product molding, refer to Figure 3 As shown, an annular handle 45 is slidably provided on the outer wall of the fixed end of the lifting mechanism 30, and the bottom surface of the annular handle 45 is fixedly connected to the top surface of each core block 431, so that by pulling the annular handle 45, all the core blocks 431 can move upward, thereby driving all the slide rods 43 to move upward and realizing the second top plate 41 being inserted into the slot.

Claims

1. A mold structure that is easy to unload, characterized in that: It includes a base, a gate-shaped bracket, a lifting mechanism, an upper mold and a lower mold. The gate-shaped bracket is arranged on the end face of the base and the lifting mechanism is arranged in the middle of its crossbeam. The upper mold is arranged on the output end of the lifting mechanism, and the lower mold is arranged on the end face of the base and is located between the gate-shaped brackets. A groove is arranged in the middle of the end face of the lower mold and a first top plate is slidably arranged in the groove. The lower mold is located at the lower side of the groove and a sliding cavity is arranged and a movable block is slidably arranged in the sliding cavity. The bottom of the movable block is connected to the bottom surface of the sliding cavity through a first spring and its top surface is connected to the bottom surface of the first top plate through a connecting rod. The end face of the lower mold located on the outer circle of the groove is provided with a spring groove and a movable pin is slidably arranged in the spring groove. The bottom surface of the movable pin is connected to the bottom surface of the spring groove through a second spring and the bottom surface of the movable pin is connected to the outer wall of the movable block through an "L"-shaped rod. A punch is arranged at the bottom of the upper mold corresponding to the groove, a top hole is arranged corresponding to the movable pin, and a second top plate is coaxially arranged in the middle of the punch.

2. A mold structure for easy unloading according to claim 1, characterized in that: The lifting mechanism adopts a hydraulic lifting rod, which is controlled by a hydraulic cylinder fixedly arranged on the end surface of the door-shaped bracket.

3. A mold structure for easy unloading according to claim 1, characterized in that: Slide blocks are respectively arranged on the outer wall of the upper mold and corresponding to the two legs of the gate-shaped bracket. Vertical sliding grooves are arranged on the opposite sides of the two legs of the gate-shaped bracket and corresponding to the slide blocks. The slide blocks are stuck in the corresponding vertical sliding grooves and are slidably connected.

4. A mold structure for easy unloading according to claim 1, characterized in that: The diameter of the "L"-shaped rod is smaller than the outer diameter of the second spring and smaller than the outer diameter of the movable pin, that is, the second spring is located at the outer ring of the "L"-shaped rod; the lower mold opens an "L"-shaped slide groove corresponding to the "L"-shaped rod, and the "L"-shaped slide groove is respectively connected with the spring groove and the slide cavity, and the transverse groove height of the "L"-shaped slide groove is not less than twice the diameter of the corresponding transverse rod of the "L"-shaped rod.

5. The mold structure for easy unloading according to claim 1, characterized in that: The connecting rods are distributed in a dot matrix on the end surface of the movable block. One end of the connecting rod away from the movable block passes through the lower mold body at the connection between the sliding cavity and the groove and is connected to the bottom surface of the first top plate. The number of the connecting rods is not less than five.

6. A mold structure for easy unloading according to claim 1, characterized in that: The spring grooves are evenly distributed around the central axis of the lower mold.

7. The mold structure for easy unloading according to claim 1, characterized in that: A slot is provided on the bottom surface of the punch corresponding to the second top plate, the second top plate is clamped in the slot and slidably connected, a plurality of sliding rods are evenly arranged on the end surface of the second top plate and around its axis, and the sliding rods are located on the outer ring of the lifting mechanism, the sliding rods pass through the upper mold and are slidably connected, an iron core clamping block is provided at the top end of the sliding rod, and a pin hole is provided on the lower side of the iron core clamping block to pass through it, and the second top plate is clamped in the slot by inserting a positioning pin into the pin hole.

8. The mold structure for easy unloading according to claim 1, characterized in that: The length of the second top plate is shorter than that of the first top plate.

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