Rubber product automatic mold

Abstract

The present invention provides a fully automatic mold for rubber products, comprising a bottom mold fixed to a lower hot plate of a vulcanizer, a support mold placed on the bottom mold and insertable on an external bracket, an upper mold arranged just above the support mold and fixed to an upper hot plate of the vulcanizer, a cavity module assembly arranged on the support mold and enclosing a product cavity, and a middle mold supported between the support mold and the upper mold, wherein the middle mold is fixed to the upper mold and clamps the cavity module assembly, wherein the cavity module assembly comprises an upper insert located above the cavity, a lower insert located below the cavity, and petal molds located on the left and right sides of the cavity, wherein a mold core is fixed on the petal mold; the upper insert is connected to the upper mold, and the petal mold cooperates with the support mold for guiding, and a pair of trapezoidal inclined guide posts are further arranged between the two petal molds, the inclined guide posts pass through the support mold, and corresponding grooves are opened on the support mold; the narrower end of the inclined guide post is fixed to the bottom mold, and when the inclined guide post moves downward relative to the support mold, the inclined guide post pushes the petal mold to move outward and separate from the product, and drives the mold core to separate from the product during the movement.

Description

Technical Field

[0001] The present invention relates to the technical field of molds, and more specifically, to a fully automatic mold for rubber products. Background Art

[0002] Rubber products such as Figure 1 As shown, it consists of a pair of flat end plates, iron parts a, and rubber parts b. The bonding between the iron parts and the rubber parts is achieved by chemical adhesives. The product is in an I-shaped shape with a large through hole c in the middle. The demoulding process must at least complete the radial core pulling action at the outer circle of the rubber and the axial core pulling action at the inner hole.

[0003] The journal number is 2018.(01):0052-02, and the paper is titled Design of Double-Cavity Automatic Demolding Mold for V-Shaped Rubber Springs. The journal number is 2013.(12):0031-03, and the paper is titled Design of Automatic Demolding Semi-Mode Rubber Stack Mold, which mainly describes a new type of automatic rubber mold. The cavity is mainly designed as a semi-mode split or four-opening mold, and a mechanism combining a support plate and a wedge block is used to realize automatic demolding of the vulcanized product with the help of the power of the vulcanizer. Its set of joint drive mechanisms can only limit the core pulling direction to the horizontal direction.

[0004] The journal number is 2012. (06): 085-04, and the paper is titled Design of Multi-directional Core-pulling Injection Mold with Delayed Core-pulling with Bent Pins. It mainly describes that in the current design of plastic molds, when there are holes, bosses, recesses or special requirements on the lateral surface of the plastic part (not in the direction of opening and closing the mold), the structure of the mold at this location must be designed to be lateral movable. Due to the complexity of the core-pulling action direction, interference is prone to occur. In view of the above problems, a multi-directional core-pulling injection mold is designed. However, its core-pulling stroke requirement is large, and all actions are realized by mold parts. Therefore, a large space must be reserved in the mold to meet the above requirements, resulting in a low mold space utilization rate.

[0005] The journal number is 2007. (08): 0059-04, and the paper is titled Application of Compound Delay Core Pulling in Mold Design. It analyzes the product structure and the technical design points of compound delay core pulling, describes the compound delay core pulling movement process, and explains that in a mold opening cycle, the compound core pulling mechanism is used to achieve delay by using springs, floating sliders, fixed-distance pull rods, etc., and the core pulling is completed well. Among them, the delayed core pulling only involves two core pullings on the side, which has certain limitations.

[0006] The journal number is 2008. (03): 0055-03, and the paper is titled Design of Injection Mold with Delayed Core Pulling Mechanism. Taking a plastic product with a long core as an example, the paper explains the key points of mold structure design and production for this product. The author introduces a time-delayed, core-pulling, and non-ejection structure, which shortens the mold opening stroke and can be produced on equipment with smaller tonnage. Since the product is small, the mold is not designed with an overflow groove, so there are certain limitations in its use.

[0007] In summary, the demoulding mold for rubber products in the prior art has the disadvantages of limited core pulling direction and large core pulling stroke, which leads to low work efficiency; the disadvantages of delayed core pulling only involve the side and are difficult to clean, which does not conform to actual working conditions. Summary of the invention

[0008] The technical problem to be solved by the present invention is to provide a fully automatic mold for rubber products in view of the shortcomings of the demoulding molds in the prior art mentioned above, which have low working efficiency and do not conform to actual working conditions. The mold is provided with three delayed core pulling locations, which can achieve high-efficiency and sequential demoulding.

[0009] The above-mentioned purpose of the present invention is achieved by the following technical solutions:

[0010] A fully automatic mold for rubber products, comprising a bottom mold fixed to a lower hot plate of a vulcanizer, a support mold placed on the bottom mold and insertable on an external bracket, a cavity module assembly arranged on the support mold and enclosing a product cavity, an upper mold fixed to an upper hot plate of the vulcanizer, and a middle mold supported between the support mold and the upper mold, wherein the middle mold is fixed to the upper mold and clamps the cavity module assembly, wherein the cavity module assembly comprises an upper insert located above the cavity, a lower insert located below the cavity, and petal molds located on the left and right sides of the cavity, wherein a mold core is fixed to the petal mold; the upper insert is connected to the upper mold, and the petal mold cooperates with the support mold guide, and a pair of trapezoidal inclined guide posts are further arranged between the two petal molds, the inclined guide posts pass through the support mold, and corresponding grooves are opened on the support mold, and the width of the grooves is greater than the maximum width of the inclined guide posts; the narrower end of the inclined guide posts is fixed to the bottom mold, and when the inclined guide posts move downward relative to the support mold, the inclined guide posts push the petal molds to move outward and separate from the product, and drive the mold core to separate from the product during the movement.

[0011] After the product is vulcanized and formed, the upper hot plate of the vulcanizer is moved up, so that the upper mold, the middle mold, and the upper insert are moved up, and the lower insert, the left and right flap molds, the mold core, the inclined guide pillars, the support mold, and the bottom mold are placed on the lower heating plate; after the lower hot plate is opened, the two ends of the support mold are inserted into the external bracket, and then the external bracket is moved up to make the support mold rise. Since the inclined guide pillars are fixed to the bottom mold, the inclined guide pillars are immovable when the support mold rises. The rise of the support mold drives the left and right flap molds to rise, and the trapezoidal inclined guide pillars push the left and right flap molds outward, so that the left and right flap molds are separated from the product; the support mold continues to rise, and the inclined guide pillars continue to push the left and right flap molds outward. At the same time, the lower insert limits the lateral displacement of the product, so that the mold core is separated from the product. Grab the product upward to complete the demoulding.

[0012] The present invention only uses the upper and lower heating plates and the external bracket of the vulcanizer, and can automatically complete the demoulding of the product in combination with the structure of the mold itself. The fully automatic core pulling greatly reduces the demoulding time and reduces the labor intensity of the operator. Due to the use of inclined guide pillars, the core pulling in the horizontal and vertical directions can be completed using the driving mechanism of the vulcanizer. The mold structure is simple, compact, and has a large space utilization rate.

[0013] Furthermore, the middle mold is connected to the bottom mold through an external sequential demolding mechanism, which includes a clamping arm 1 that can rotate and pass through the support mold and is fixed to the bottom mold, and a constraint plate that is fixed to the middle mold and is used to constrain the clamping arm 1 to open. When the upper mold drives the middle mold to move upward, the constraint plate first moves upward synchronously with the upward movement of the middle mold, and then disengages from the clamping arm 1.

[0014] It should be noted that due to the thermal expansion of the internal rubber of the flap mold, the flap mold has a large outward thrust, and the inclined base and flap mold may be self-locked, that is, the upward movement of the upper mold drives the inclined base, flap mold, and the support mold connected to the flap mold to move upward together. To avoid this situation, the demoulding of the support mold is also delayed.

[0015] The external sequential demoulding mechanism connects the middle mold and the bottom mold and passes through the support mold. Since the constraint plate on the middle mold constrains the clamping arm 1 on the support mold, the clamping arm 1 passes through the support mold and clamps the support mold. When the inclined base starts to move up, although the constraint plate moves up with the middle mold, the clamping arm 1 is not fully opened and still clamps the support mold. At this time, it is equivalent to the clamping arm 1 fixed to the bottom mold pulling the support mold so that the support mold will not move up with the petal mold. At the same time, it also pulls the petal mold to prevent the petal mold from moving up with the middle mold due to the self-locking force. After the middle mold moves up a certain distance, the clamping arm 1 separates from the constraint plate. At this time, since the middle mold has risen a certain distance and the petal mold has been opened, the thermal expansion of the internal rubber pushes the petal mold outward. At this time, the petal mold and the middle mold will not self-lock.

[0016] Furthermore, the upper insert block is connected to the upper die through a limit bolt. When the upper die moves upward, it first moves upward along the limit bolt, and then the limit bolt pulls the upper insert block upward. By setting the limit bolt, when the upper hot plate of the vulcanizing machine moves upward, since the upper die is fixed to the upper hot plate of the vulcanizing machine, the upward movement of the upper die drives the middle die to move upward as well. During mold closing, since the middle die holds the left and right split dies tightly, after the middle die moves upward, the holding force decreases, and the left and right split dies will displace outward a small distance under the action of product expansion, losing the holding friction force on the upper insert block. Subsequently, after the upper die reaches its position along the limit bolt, the limit bolt drives the upper insert block upward. It should be noted that the upper insert block can move upward smoothly precisely because it loses the holding force of the left and right split dies on it, enabling the limit bolt to drive the upper insert block upward. The upper die and the upper insert block are connected through a limit bolt to achieve delayed core pulling when the upper insert block is demolded. If there is no delayed core pulling and the upper die drives the middle die and the upper insert block to move upward together, due to the holding force of the middle die and the left and right split dies on the upper insert block, it is very difficult for the upper die to drive the middle die and the upper insert block upward. The present invention precisely solves this problem by setting the sequential actions of the middle die, the left and right split dies, and the upper insert block and reasonably arranging the core pulling stroke.

[0017] Furthermore, a mold support groove is formed on the mold support. The first clamping arm passes through the mold support groove from the bottom die and is wrapped by the restraint plate. The bottom of the mold support groove is in the shape of a Chinese character 'Ri' (日), and the part near the upper surface of the mold support is in the shape of a Chinese character 'Kou' (口) without the horizontal bar of the 'Ri' shape. The first clamping arm passes through the 'Ri'-shaped groove from the bottom die, and the horizontal bar of the 'Ri'-shaped groove is located in the gap surrounded by the first clamping arm. During mold closing, the restraint plate extends into the mold support groove to wrap the first clamping arm.

[0018] Furthermore, the guiding and cooperating of the split die and the mold support means that: a T-shaped guide rail is fixed on the mold support. When the split die moves outward and separates from the product along with the relative movement of the mold support and the bottom die, the split die moves along the T-shaped guide rail. While guiding with the T-shaped guide rail, the split die is connected to the mold support. When the middle die moves upward, the bottom die and the mold support pull the split die through the T-shaped guide rail to prevent the split die from moving upward along with the middle die due to the thermal expansion of the rubber in the cavity.

[0019] Furthermore, when the upward movement of the upper die drives the middle die to move upward, in order to enable the middle die to smoothly release the holding force on the left and right split dies, the middle die is an inclined base with an inclined surface. The inclined surface of the inclined base inclines towards the split die direction, and the surface corresponding to the contact between the split die and the inclined base is also an inclined surface. When the middle die with an inclined surface rises, the holding force of the middle die on the split die can be reduced.

[0020] Furthermore, the lower insert is connected to the bottom mold through a built-in sequential demolding mechanism; the built-in sequential demolding mechanism includes a pin fixed to the lower insert and a clamping arm 2 fixed to the bottom mold which can rotate and clamp the pin, and the axial direction of the pin is perpendicular to the rotation plane of the clamping arm 2; a constraint groove for constraining the opening of the clamping arm 2 is opened at the bottom of the support mold, and when the mold is closed, the constraint groove wraps the clamping arm 2, and the pin is located in the gap surrounded by the clamping arm; when the support mold moves up, the constraint groove is disengaged from the clamping arm 2, the lower insert moves up, and the pin is disengaged from the clamping arm 2.

[0021] A built-in sequential demoulding mechanism is provided to realize delayed core pulling in the vertical direction. Specifically: when the external bracket drives the mold to move upward, the clamping arm 2 is wrapped by the constraint groove at the bottom of the mold, and the clamping arm 2 is fixed to the bottom mold. When the mold starts to move upward, the lower insert does not move due to the constraint of the constraint groove at the bottom of the mold; but at this time, due to the upward movement of the mold, the left and right petal molds move outward to both sides, and the left and right petal molds are separated from the product. Since the lower insert is stationary at this time, the mold is rising, and the mold drives the left and right petal molds, the mold core and the product to rise together, so that the product is separated from the lower insert. The present invention is provided with a built-in sequential demoulding mechanism to delay the rising of the lower insert, thereby separating the lower insert from the product. The design is ingenious, and automatic sequential demoulding can be easily realized by utilizing the structure of the mold. In addition, the built-in sequential demoulding mechanism has a simple structure, and the structure is embedded in the mold, so the mold space is greatly utilized. After the ejector moves up a certain distance, the constraint groove is disengaged from the clamping arm 2 fixed to the bottom mold, and then the ejector drives the lower insert to move up. The upward movement of the lower insert provides operating space for subsequent cleaning of the film at the bottom end of the lower insert with the glue escape hole.

[0022] In order to prevent interference between the ejector and the upper insert when the ejector moves upward and the lower insert does not move, and to allow the lower insert to rise with the ejector after the second clamping arm is separated from the constraint groove, the present invention further makes the following arrangements:

[0023] Furthermore, the lower insert passes through the support mold and is connected to the bottom mold. The bottom of the lower insert is a trapezoid, and the two sides of the trapezoidal bottom are inclined surfaces. The bottom of the lower insert passes through the support mold, and the corresponding position of the support mold is also an inclined surface. When the mold is closed, the inclined surface of the bottom of the lower insert does not contact the inclined surface of the support mold, but the height of the trapezoidal bottom is greater than the thickness of the support mold, so that after the support mold moves up a distance d, the support mold drives the lower insert to move up together, and the distance d is greater than or equal to the height of the constraint groove.

[0024] Furthermore, when the rubber product is in an I-shape, that is, the two ends are flat end plate iron pieces and the middle is rubber, the upper insert and the lower insert together form a rubber cavity, the flat end plate iron piece is located between the flap mold and the rubber cavity, and a magnet is fixed on the side of the flap mold facing the product cavity, and the flat end plate iron piece is fixed under the suction force of the magnet.

[0025] Preferably, a spring is sleeved on the limit bolt, and after the mold is closed, the spring exerts pressure on the upper insert to press the upper insert. A spring is also sleeved on the mold core, and after the middle mold moves up, the left and right molds move outwards under the combined action of the thermal expansion of the product and the mold core spring, and the spring on the mold core can completely fit the two sections of the mold core after the mold is closed.

[0026] The present invention has the following beneficial effects:

[0027] The present application only relies on the vulcanizer as the power mechanism, improves the structure of the mold, and can achieve efficient and fully automatic ejection that meets the actual working conditions. In the demoulding process of this embodiment, a total of three delayed core pullings are included, including two when pulling the upper core and one when pulling the lower core. The three delayed core pullings realize the sequential demoulding of the mold described in this application, and the demoulding sequence is: upper mold and middle mold-upper insert-lower insert-petal mold-core. Among them, the external demoulding mechanism realizes the demoulding of the upper mold and the middle mold; the limit bolt realizes the demoulding of the upper mold and the middle mold first, and then the demoulding of the upper insert; the built-in sequential demoulding mechanism enables the ejector to first drive the petal mold upward during the rising process, so that the inclined guide column pushes the petal mold outward, first separates the product from the petal mold, and after the clamping arm 2 is separated from the ejector groove, the ejector drives the lower insert to move upward, so that the upper insert is lifted. It is precisely because of the three delayed core pullings that the mold is sequentially demoulded, the work efficiency is high, and it meets the actual working conditions. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings constituting a part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0029] Figure 1 It is a schematic diagram of the structure of the rubber product of Example 1.

[0030] Figure 2 It is a schematic diagram of the structure of a fully automatic mold for rubber products.

[0031] Figure 3 This is a schematic diagram of the fully automatic mold structure for rubber products (some mold structures are hidden).

[0032] Figure 4 It is a schematic diagram of the structure of the upper insert and the lower insert.

[0033] Figure 5 It is a schematic diagram of the upper mold structure.

[0034] Figure 6 It is a schematic diagram of the inclined base structure.

[0035] Figure 7 It is a schematic diagram of the flap mold.

[0036] Figure 8 It is a schematic diagram of the middle mold structure.

[0037] Fig. 9 It is a schematic diagram of the bottom mold structure (lower surface).

[0038] Fig.10 This is a left view structural diagram of a fully automatic mold for rubber products (with the mold support hidden).

[0039] Fig.11 It is the assembly drawing of the ejector, external sequential demoulding mechanism, and internal sequential demoulding mechanism.

[0040] Fig.12 It is a schematic diagram of the bottom mold structure (upper surface).

[0041] Bottom mold 1, oblique guide column installation position 11, clamping arm second installation groove 12, overflow glue groove 13; support mold 2, support mold groove 21, lower insert passing groove 22, oblique guide column passing groove 23, T-shaped guide rail 24, support mold and oblique base matching groove 25, constraint groove 26, T-shaped guide rail installation position 27, support mold groove cross bar 28; oblique guide column 3; left flap mold 41, right flap mold 42, flap mold and oblique guide column matching position 43; external sequential demoulding mechanism 5, constraint plate 51, clamping arm 1 52 ; Upper die 6, groove 61 for the upper die to cooperate with the inclined base, limit bolt 62, limit bolt spring 63, upper insert and upper die cooperation place 64; upper insert 7; inclined base 8, convex block 81 cooperating with the upper die, convex block 82 cooperating with the support die, fastening bolt 83 between the inclined base and the upper die; lower insert 9; built-in sequential demoulding mechanism, cylindrical pin 101, clamping arm 2 102; mold core 001; mold core spring 002; magnet 003; flat end plate iron piece a, rubber b in the middle, large through hole c. DETAILED DESCRIPTION

[0042] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, but the present invention can be implemented in many different ways as defined and covered by the claims.

[0043] Example 1

[0044] This embodiment provides a fully automatic mold for rubber products, wherein the rubber products are as follows Figure 1 The I-shaped product shown has flat end plate iron pieces a at both ends, rubber b in the middle, and a large through hole c in the middle of the product. The demoulding process must at least complete the radial core pulling action at the outer circle of the rubber and the axial core pulling action at the inner hole. As can be seen from the background technology, the rubber product molds in the prior art have complex structures and low working efficiency, and do not take into account the actual working conditions during the demoulding process of rubber products. This application is designed to design a fully automatic mold for rubber products in response to the two points of low working efficiency and non-compliance with actual working conditions. The following is a detailed description of this application in conjunction with the accompanying drawings:

[0045] A fully automatic mold for rubber products, such as Figure 2As shown, it includes a bottom mold 1 fixed to the lower hot plate of the vulcanizer, a support mold 2 placed on the bottom mold 1 and insertable on an external bracket, a cavity module assembly arranged on the support mold 2 and enclosing a product cavity, an upper mold 6 fixed to the upper hot plate of the vulcanizer, and a middle mold supported between the support mold 2 and the upper mold 6, wherein the middle mold is fixed to the upper mold 6 and clamps the cavity module assembly.

[0046] The cavity module assembly includes an upper insert 7 located above the cavity, a lower insert 9 located below the cavity, and flap molds located on the left and right sides of the cavity, and a mold core 001 is fixed on the flap mold; the upper insert 7 is connected to the upper mold 6, and the flap mold is guided and matched with the support mold 2. A pair of trapezoidal inclined guide pillars 3 are also arranged between the two flap molds, and the inclined guide pillars 3 pass through the support mold 2, and the support mold 2 is correspondingly provided with grooves, such as Figure 3 and Figure 8 As shown, the groove 23 through which the inclined guide column 3 passes has a width greater than or equal to the maximum width of the inclined guide column 3; the narrower end of the inclined guide column 3 is fixed to the bottom mold 1, and when the inclined guide column 3 moves downward relative to the support mold 2, the inclined guide column 3 pushes the flap mold to move outward and separate from the product, and drives the mold core 001 to separate from the product during the movement. The upper insert 7 has an upper core surface of rubber, and the lower insert 9 has a lower core surface of rubber. The upper insert 7 and the lower insert 9 together form a rubber cavity. The flat end plate iron piece is located between the flap mold and the rubber cavity, and a magnet 003 is fixed on the side of the flap mold facing the product cavity, and the flat end plate iron piece is fixed under the suction of the magnet 003.

[0047] like Figure 6 As shown, the middle mold is an inclined base 8 with an inclined surface. In this embodiment, the inclined surface of the inclined base 8 is inclined toward the direction of the flap mold, and the surface where the flap mold and the inclined base 8 meet is also an inclined surface. The surface of the inclined base 8 opposite to the inclined surface is a vertical surface, flush with the upper mold 6, and the inclined base 8 is connected to the upper mold 6 by mortise and tenon joints, as shown in FIG. Figure 6 As shown, the inclined base 8 has a protrusion 81 that cooperates with the upper mold 6, and the upper mold 6 has a groove 61 that cooperates with the upper mold and the inclined base. The inclined base 8 and the upper mold 6 are connected and fixed by bolts. The inclined base 8 and the support mold 2 are connected by mortise and tenon joints without using fasteners, so that when the upper mold 6 moves up, the inclined base 8 can be driven to move up. Figure 6 As shown, the inclined base 8 has a protrusion 82 that cooperates with the support mold 2, and the support mold 2 has a groove 25 that cooperates with the inclined base 8.

[0048] The guide cooperation between the flap mold and the support mold 2 means that a T-shaped guide rail 24 is fixed on the support mold 2, and when the flap mold moves outward and separates from the product with the relative movement of the support mold 2 and the bottom mold 1, the flap mold moves along the T-shaped guide rail 24. Figure 3 As shown, the flap mold is connected to the support mold 2 while being guided by the T-shaped guide rail 24 .

[0049] After the product vulcanization is completed, due to the thermal expansion of the internal rubber of the valve, there is a large outward thrust on the valve mold. The inclined base and the valve mold may be self-locked, and then the support mold is also driven upward through the T-shaped pin. If the support film connected to the valve is pulled, this problem is solved. The external sequential demolding mechanism 5 solves this problem well and ensures sequential demolding: the middle mold is connected to the bottom mold 1 through the external sequential demolding mechanism 5. The external sequential demolding mechanism 5 includes a clamping arm 52 that can rotate and pass through the support mold 2 and is fixed to the bottom mold 1, and a constraint plate 51 fixed to the middle mold for restricting the opening of the clamping arm 52. When the upper mold 6 drives the middle mold to move upward, the constraint plate 51 first moves upward synchronously with the upward movement of the middle mold, and then disengages from the clamping arm 52. As Fig.10 shown, the constraint plate 51 is a square plate with a groove, and the opening of the groove faces downward. The clamping arm 52 is two claws that can be opened and closed. When the mold is closed, the clamping arm 52 is constrained in the groove of the constraint plate 51. The constraint plate 51 is fixed to the vertical surface of the inclined base 8 and moves upward with the inclined base 8. When the clamping arm 52 is located in the groove of the constraint plate 51, the clamping arm 52 is in a clamped state and clamps the support mold 2, and the bottom mold 1 pulls the support mold 2, so that the support mold 2 pulls the valve mold (pulls the valve through the T-shaped guide rail), so that the valve mold does not move upward with the inclined base 8. As Figure 8 and 9 shown, the support mold 2 is provided with a groove, and the clamping arm 52 passes through the support mold groove 21 from the bottom mold 1 and is wrapped by the constraint plate 51. The bottom of the support mold groove 21 is in the shape of a Chinese character 'Ri' (日), and the part near the upper surface of the support mold 2 is in the shape of a Chinese character 'Kou' (口) without a horizontal bar. The two claws of the clamping arm 52 pass through the 'Ri'-shaped groove from the bottom mold 1, and the horizontal bar 28 of the 'Ri'-shaped support mold groove 21 is located in the gap surrounded by the two claws. When the mold is closed, the constraint plate 51 extends into the support mold groove 21 to wrap the clamping arm 52. As Figure 8 shown, it includes four sets of external sequential demolding mechanisms 5.

[0050] The upper insert 7 is connected to the upper mold 6 through a limit bolt 62. When the upper mold 6 moves upward, it first moves upward along the limit bolt 62, and then the limit bolt 62 pulls the upper insert 7 to move upward. A spring is sleeved on the limit bolt 62. After the mold is closed, the spring has a pressure on the upper insert 7 to press the upper insert 7 tightly. The upper mold 6 has a mating part 64 between the upper insert 7 and the upper mold 6. When the mold is closed, the top of the upper insert 7 is mated with this part for positioning. A spring is sleeved on the mold core 001. After the middle mold moves upward, the left and right valve molds displace outward under the combined action of product thermal expansion and the mold core spring 002. And, after the mold is closed, the spring on the mold core 001 can press the product iron part tightly. The setting of the limit bolt 62 enables the upper insert 7 to move upward with the upper mold 6 after the valve mold is opened, realizing sequential demolding.

[0051] As Fig.10 and 11As shown, the lower insert 9 is connected to the bottom mold 1 through a built-in sequential demoulding mechanism; the built-in sequential demoulding mechanism includes a pin fixed to the lower insert 9 and a clamping arm 102 fixed to the bottom mold 1 and capable of rotatably clamping the pin. The pin is cylindrical, and the axial direction of the pin is perpendicular to the rotation surface of the clamping arm 102; the bottom of the support mold 2 is provided with a restraining groove 26 for restraining the clamping arm 102 from opening. When the mold is closed, Fig.11 As shown, the constraint groove 26 wraps the second clamping arm 102, and the pin is located in the gap surrounded by the clamping arm; when the ejector 2 moves upward, the constraint groove 26 is separated from the second clamping arm 102, and the lower insert 9 moves upward, and the pin is separated from the second clamping arm 102.

[0052] like Fig.11 As shown, the lower insert 9 passes through the support mold 2 and is connected to the bottom mold 1. The bottom of the lower insert 9 is a trapezoid, and the two sides of the trapezoidal bottom are inclined surfaces. The bottom of the lower insert 9 passes through the support mold 2, and the corresponding position of the support mold 2 is also an inclined surface. When the mold is closed, the inclined surface at the bottom of the lower insert 9 does not contact the inclined surface of the support mold 2, but the height of the trapezoidal bottom is greater than the thickness of the support mold 2, so that after the support mold 2 moves up a distance d, the support mold 2 drives the lower insert 9 to move up together, and the distance d is greater than or equal to the height of the constraint groove. When the mold is closed, the lower insert 9 passes through the support mold 2 and stands on the bottom mold 1. The cylindrical pin 101 on the lower insert 9 is located in the gap surrounded by the clamping arm 1 52. There is a gap between the lower insert 9 and the support mold 2. When the support mold 2 rises, the support mold 2 does not contact the lower insert 9 at the beginning. After the support mold 2 rises a certain distance, the inclined surface on the support mold 2 contacts the inclined surface at the bottom of the lower insert 9, pushing the lower insert 9 to move up. At this time, the clamping arm 1 52 is also separated from the constraint groove. At this time, the rising height d of the ejector 2 is greater than or equal to the height of the constraining groove.

[0053] The built-in sequential demoulding mechanism and the constraint groove 26 are both arranged inside the mold. The built-in sequential demoulding mechanism does not occupy the heat conduction position, such as the end face of the iron piece. If a space is dug on the surface of the petal mold facing the iron piece, it will affect the heat transfer, and then the product molding will also be affected. In addition, the built-in demoulding structure is simple in structure, and sequential demoulding can be achieved by relying on the mold structure, without using other driving mechanisms except the vulcanizer. Therefore, the structure is simple and the working efficiency is high. It is not like the oil cylinder cylinder drive and belt transmission that need to be outside the machine body.

[0054] This application only relies on the vulcanizer as the power mechanism, improves the structure of the mold, and can achieve efficient and fully automatic demolding that meets actual working conditions. In the demolding process of this embodiment, a total of three delayed core pullings are included, including two when pulling the upper core and one when pulling the lower core. The three delayed core pullings realize the sequential demolding of the mold described in this application, and the demolding sequence is: upper mold 6 and inclined base 8-upper insert 7-lower insert 9-petal mold-core 001. Among them, the external demolding mechanism realizes the demolding of the upper mold 6 and the middle mold; the limiting bolt realizes the demolding of the upper mold 6 and the middle mold first, and then the demolding of the upper insert 7; the built-in sequential demolding mechanism enables the support mold 2 to first drive the petal mold upward during the rising process, so that the inclined guide column 3 pushes the petal mold outward, first separates the product from the petal mold, and after the clamping arm 2 102 is separated from the support mold groove 21, the support mold 2 drives the lower insert 9 to move upward, so that the upper insert 7 is lifted. It is precisely because of the three delayed core pulling that the mold can be demoulded in sequence, with high work efficiency and in line with actual working conditions.

[0055] This application arranges the mold cavity vertically and uses only one set of drive mechanisms of the vulcanizer, which reduces the mold specifications while meeting the requirements of vulcanization heat transfer and operating space. On this basis, the built-in sequential demolding mechanism, cylindrical pin 101, and T-shaped guide rail 24 are embedded, that is, these structures are arranged in the movable parts that need to be cored out, reducing the weight of the mold and development costs. It is precisely because of these structural settings that the order of core pulling is effectively ensured, and sufficient travel is reserved for delayed core pulling, fully satisfying the order of core pulling. Fully automatic core pulling greatly reduces demolding time and reduces the labor intensity of operators.

[0056] The workflow is as follows:

[0057] 1. Pull out the upper core. Open the hot plate of the vulcanizer, move the upper mold 6 upward, and the upper mold 6 drives the inclined base 8 upward. The restraining plate 51 at the bottom of the inclined base 8 moves upward with it, and then separates from the clamping arm 52; the inclined base 8 moves upward, gradually releasing the clamping force on the flap mold. The flap mold will move outward a small distance under the combined action of the thermal expansion of the product and the mold core spring 002, and lose the clamping friction force on the upper insert 7. Then, the limit bolt 62 between the upper mold 6 and the upper insert 7 is also in place, and the limit bolt 62 separates the upper insert 7 with the upper core surface from the product.

[0058] Open the hot plate of the vulcanizer, and the bottom mold 1 first pulls the upper mold 6 and the inclined base 8 apart through the pulling force of the four sets of external sequential demoulding mechanisms 5, the shear force of the mold core 001 on the product, and the bolt pulling force between the support mold 2 and the T-shaped pull block. At the beginning of this process, the upper insert 7 is retained by the clamping friction force of the petal mold and the spring elastic force. Then, the inclined base 8 moves up with the upper mold 6.

[0059] 2. Pull out the core. The lower hot plate of the vulcanizer is opened, and the external bracket is lifted. The mold support 2 rises, and the lower hot plate is opened, and the external bracket is lifted. In the case that the external sequential demolding mechanism 5 fails, the mold support 2 rises, and the inclined guide column 3 and the bottom mold 1 are fixed. Since the lower insert 9 is connected to the bottom mold 1 through the built-in sequential demolding mechanism, the lower insert 9 also does not move. The rise of the mold support 2 drives the flap mold, the mold core 001 and the product to rise. The inclined guide column 3 pushes the flap mold outward, and the flap mold is separated from the product. At the same time, the lower insert 9 is separated from the product. The mold support 2 continues to rise, and the groove at the bottom of the mold support 2 is separated from the clamping arm 102. The pin on the lower insert 9 is disengaged from the clamping arm 102, and the lower insert 9 moves up with the mold support 2, providing operating space for the subsequent cleaning of the film at the bottom of the lower insert 9 with the glue escape hole.

[0060] 3. Pull out the side core. After the lower core is pulled out, the support mold 2 continues to rise, and the inclined guide pillar 3 continues to push the flap mold outward, thereby driving the model to separate from the product.

[0061] 4. Take out the product. After the mold core 001 is completely separated from the product, the product falls back to the lower insert 9 under the action of its own weight. Due to the influence of thermal expansion, the diameter of the product surface will be larger than that of the lower insert 9, resulting in the product surface not fitting with the lower insert 9. Step 2 is still valid.

[0062] 5. Mold the iron parts and rubber materials. First, pass the iron parts through the mold core 001 and stick to the flap mold. The iron parts are fixed under the suction of the magnet 003 on the flap mold.

[0063] 6. Mold closing. After the upper hot plate is moved in, the lower hot plate is raised. The upper insert 7 will fit with the lower insert 9 under the action of the spring, effectively preventing the material from running out of the parting surface of the upper and lower inserts 9. The lower hot plate is continued to rise, and the conical surface between the inclined base 8 and the flap mold begins to work, and the flap mold moves inward until the flap mold is completely fitted with the end surface of the upper mold 6.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the present invention.

Claims

1. A fully automatic mold for rubber products, comprising a bottom mold fixed to the lower hot plate of a vulcanizer, a support mold placed on the bottom mold and insertable onto an external bracket, a cavity module assembly arranged on the support mold and enclosing to form a product cavity, an upper mold fixed to the upper hot plate of the vulcanizer, and a middle mold supported between the support mold and the upper mold. The middle mold is fixed to the upper mold and clamps the cavity module assembly. Characterized in that, The cavity module assembly includes an upper insert block located above the cavity, a lower insert block located below the cavity, and flap molds located on the left and right sides of the cavity. A mold core is fixed on the flap molds. The upper insert block is connected to the upper mold, and the flap molds are in guiding cooperation with the support mold. A pair of trapezoidal inclined guide posts are also arranged between the two flap molds. The inclined guide posts pass through the support mold, and corresponding slots are opened on the support mold. The width of the slots is greater than the maximum width of the inclined guide posts. The narrower end of the inclined guide posts is fixed to the bottom mold. When the inclined guide posts move downward relative to the support mold, the inclined guide posts push the flap molds to move outward and separate from the product, and drive the mold core to separate from the product during the movement.

2. The fully automatic mold for rubber products according to claim 1, Characterized in that, The middle mold is connected to the bottom mold through an external sequential demolding mechanism. The external sequential demolding mechanism includes a clamping arm one that can rotate and pass through the support mold and is fixed to the bottom mold, and a constraint plate fixed to the middle mold for restricting the opening of the clamping arm one. When the upper mold drives the middle mold to move upward, the constraint plate first moves upward synchronously with the upward movement of the middle mold, and then disengages from the clamping arm one.

3. The fully automatic mold for rubber products according to claim 2, Characterized in that, The upper insert block is connected to the upper mold through a limit bolt. When the upper mold moves upward, it first moves upward along the limit bolt, and then the limit bolt pulls the upper insert block to move upward.

4. The fully automatic mold for rubber products according to claim 2, Characterized in that, A support mold groove is opened on the support mold. The clamping arm one passes through the support mold groove from the bottom mold and is wrapped by the constraint plate. The bottom of the support mold groove is in the shape of a "ri" character, and the part near the upper surface of the support mold is in the shape of a "kou" character missing the horizontal bar of the "ri" character. The clamping arm one passes through the "ri" character groove from the bottom mold, and the horizontal bar of the "ri" character groove is located in the gap surrounded by the clamping arm one. When closing the mold, the constraint plate extends into the support mold groove to wrap the clamping arm one.

5. The fully automatic mold for rubber products according to claim 2, Characterized in that, The guiding cooperation between the flap mold and the support mold means that: a T-shaped guide rail is fixed on the support mold. When the flap mold moves outward and separates from the product along with the relative movement of the support mold and the bottom mold, the flap mold moves along the T-shaped guide rail.

6. The fully automatic mold for rubber products according to claim 2, Characterized in that, The middle mold is an inclined base with an inclined surface. The inclined surface of the inclined base inclines towards the flap mold direction, and the corresponding surface at the junction of the flap mold and the inclined base is also an inclined surface.

7. The fully automatic mold for rubber products according to claim 3, Characterized in that, A spring is sleeved on the limit bolt, and the spring presses the upper insert block tightly.

8. The fully automatic mold for rubber products according to claim 1, Characterized in that, The lower insert is connected to the bottom mold through a built-in sequential demoulding mechanism; the built-in sequential demoulding mechanism includes a pin fixed to the lower insert and a clamping arm 2 fixed to the bottom mold which can rotate and clamp the pin, and the axial direction of the pin is perpendicular to the rotation surface of the clamping arm 2; a constraint groove for constraining the opening of the clamping arm 2 is opened at the bottom of the ejector mold, and when the mold is closed, the constraint groove wraps the clamping arm 2, and the pin is located in the gap surrounded by the clamping arm; when the ejector mold moves up, the constraint groove is disengaged from the clamping arm 2, the lower insert moves up, and the pin is disengaged from the clamping arm 2.

9. The fully automatic mold for rubber products according to claim 8, It is characterized in that The lower insert passes through the support mold and is connected to the bottom mold. The bottom of the lower insert is a trapezoid, and the two sides of the trapezoidal bottom are inclined surfaces. The bottom of the lower insert passes through the support mold, and the corresponding position of the support mold is also an inclined surface. When the mold is closed, the inclined surface of the bottom of the lower insert does not contact the inclined surface of the support mold, but the height of the trapezoidal bottom is greater than the thickness of the support mold, so that after the support mold moves up a distance d, the support mold drives the lower insert to move up together, and the distance d is greater than or equal to the height of the groove.

10. The fully automatic mold for rubber products according to claim 1, It is characterized in that When the rubber product is in an I-shape, that is, with flat end plate iron pieces at both ends and rubber in the middle, the upper insert and the lower insert together form a rubber cavity, the flat end plate iron piece is located between the flap mold and the rubber cavity, and a magnet is fixed on the side of the flap mold facing the product cavity, and the flat end plate iron piece is fixed under the suction of the magnet.

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